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MLA

Roberts, John, United States Bureau of Animal Industry, and United States Department of Agriculture. Welsh black cattle . U.S. Dept. of Agriculture, Bureau of Animal Industry, 1907.

APA

Roberts, John, United States Bureau of Animal Industry, and United States Department of Agriculture. (1907). Welsh black cattle. U.S. Dept. of Agriculture, Bureau of Animal Industry.

Chicago

Roberts, John, United States Bureau of Animal Industry, and United States Department of Agriculture. Welsh black cattle . U.S. Dept. of Agriculture, Bureau of Animal Industry, 1907.