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MLA

Black, W. H. Beef-cattle breeds for beef and for beef and milk . U.S. Dept. of Agriculture, 1937.

APA

Black, W. H. (1937). Beef-cattle breeds for beef and for beef and milk. U.S. Dept. of Agriculture.

Chicago

Black, W. H. Beef-cattle breeds for beef and for beef and milk . U.S. Dept. of Agriculture, 1937.