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Changes in Agricultural Production
Commerce Secretary Hoover, 1926
United States Commerce Secretary Herbert Hoover, center, in 1926 with his assistants William McCracken, left, and Walter Drake. Hoover became U.S. President in 1929.
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"Commerce Secretary Hoover, 1926."
https://en.wikipedia.org/wiki/Herbert_Hoover#/media/File:HooverCommerce1926.jpg
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Public domain.