PICRYL
PICRYL

The World's Largest Public Domain Source

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Public Health Service Investigation Commission to the China-Burma highway, Chefang (vicinity), China. Gambusia minnow hatchery in a spring at the edge of the rice fields. When the gambusia were put here, herons and other birds start to eat them. Thus the spring had to be covered with loosely woven mats; when the cattle trampled these a fence had to be built
Public Health Service Investigation Commission to the China-Burma highway, Chefang (vicinity), China. Gambusia minnow hatchery in a spring at the edge of the rice fields. When the gambusia were put here, herons and other birds start to eat them. Thus the spring had to be covered with loosely woven mats; when the cattle trampled these a fence had to be built
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