Public domain
Public Health Service Investigation Commission to the China-Burma Highway, Chefang Valley, China. Taking sample to test for anopheles from the Old Fort seepage. There is soap controlled breeding for 300 feet
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit linePublic Health Service Investigation Commission to the China-Burma Highway, Chefang Valley, China. Taking sample to test for anopheles from the Old Fort seepage. There is soap controlled breeding for 3. 1939-01-01. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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