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MLA

Rommel, George M, United States Bureau of Animal Industry, and United States Department of Agriculture. The fecundity of Poland China and Duroc Jersey sows . U.S. Dept. of Agriculture, Bureau of Animal Industry, 1906.

APA

Rommel, George M, United States Bureau of Animal Industry, and United States Department of Agriculture. (1906). The fecundity of Poland China and Duroc Jersey sows. U.S. Dept. of Agriculture, Bureau of Animal Industry.

Chicago

Rommel, George M., United States Bureau of Animal Industry, and United States Department of Agriculture. The fecundity of Poland China and Duroc Jersey sows . U.S. Dept. of Agriculture, Bureau of Animal Industry, 1906.