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Google圖書搜尋
The Hohenheim System in the Management of Permanent Pastures for Dairy Cattle
Thompson Elwyn Woodward
Mason August Hein
Joseph Benjamin Shepherd
出版
U.S. Department of Agriculture
, 1938
URL
http://books.google.com.hk/books?id=YEkDDjFNSGAC&hl=&source=gbs_api
EBook
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