Public domain
Horace Campbell, associate chemist, adjusts automatic thermal control of the tunnel dehydrater in use at the regional agricultural research laboratory, Albany, California
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineHorace Campbell, associate chemist, adjusts automatic thermal control of the tunnel dehydrater in use at the regional agricultural research laboratory, Albany, California. 1942-01-01. Lee, Russell. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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