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MLA

Semple, Arthur T. (Arthur Truman). More food through conservation farming. U.S. Dept. of Agriculture, 1942.

APA

Semple, Arthur T. (Arthur Truman). (1942). More food through conservation farming. U.S. Dept. of Agriculture.

Chicago

Semple, Arthur T. (Arthur Truman) More food through conservation farming. U.S. Dept. of Agriculture, 1942.