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1920th Pavlov IP - A black and white photo of a man with a beard

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1920th Pavlov IP - A black and white photo of a man with a beard

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Summary

Русский: Иван Петрович Павлов в Российской Академии наук

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Date

02/01/1922
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Source

Academy of Sciences of the USSR
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public domain

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ivan pavlov
ivan pavlov