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Google圖書搜尋
Some Effects of the Species and Stage of Maturity of Plants on the Forage Consumption of Grazing Steers of Various Weights
Wesley Patterson Garrigus
Henry Perly Rusk
出版
University of Illinois Agricultural Experiment Station
, 1939
URL
http://books.google.com.hk/books?id=cJ-AGwAACAAJ&hl=&source=gbs_api
