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Google圖書搜尋
The Relative Merits of Producing Creep-fed, Feeder, and Lot-fattened Calves in West Virginia
Charles Vinyard Wilson
Earl W. McComas
出版
The Station
, 1939
URL
http://books.google.com.hk/books?id=HjdoF2Js_vkC&hl=&source=gbs_api