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Google圖書搜尋
The Duration of Gestation in Dairy Cattle
Odie Talmadge Stallcup
Arkansas Agricultural Experiment Station
Connell J. Brown
Otis Howard Horton
出版
Agricultural Experiment Station, College of Agriculture and Home Economics, University of Arkansas
, 1956
URL
http://books.google.com.hk/books?id=2bE_OwAACAAJ&hl=&source=gbs_api