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Evaluation of Mammary-gland Development in Holstein and Jersey Calves as a Measure of Potential Producing Capacity

Walter Whittier Swett

出版	U.S. Department of Agriculture, 1955
URL	http://books.google.com.hk/books?id=6LIXAAAAYAAJ&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN