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Topic: oral communication

156 media by topicpage 1 of 2
Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more

Speech and facsimile scrambling and decoding

Speech and facsimile scrambling and decoding

Title on half-title page: Summary technical report of the National Defense Research Committee. "Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Col... more