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Economic Factors Affecting the Beef-cattle Industry of Virginia

Charles Alexander BurmeisterHerman M. ConwayAlbert Perry Brodell

出版	U.S. Department of Agriculture, 1931
URL	http://books.google.com.hk/books?id=6NSf8Od6nA4C&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN