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Google圖書搜尋
Crossbred Beef Cattle for the Northern Great Plains
Bradford Knapp (Jr.)
Alfred Leroy Baker
Richard Turnbull Clark
出版
U.S. Department of Agriculture
, 1949
URL
http://books.google.com.hk/books?id=f3UUzQEACAAJ&hl=&source=gbs_api
