Eckles, C. H. (1956). Dairy cattle and milk production (5th edition.). Macmillan.
Cita Chicago Style (17a ed.)Eckles, Clarence H. Dairy Cattle and Milk Production. 5th edition. New York: Macmillan, 1956.
Cita MLA (8a ed.)Eckles, Clarence H. Dairy Cattle and Milk Production. 5th edition. Macmillan, 1956.
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