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Google圖書搜尋
A Description of Production and Management Practices on Dairy Farms in Massachusetts
Robert Lawrence Christensen
出版
Massachusetts Agricultural Experiment Station, College of Food and Natural Resources, University of Massachusetts at Amherst
, 1981
URL
http://books.google.com.hk/books?id=Tx-MuAAACAAJ&hl=&source=gbs_api