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Google圖書搜尋
Farm Programs for the 1970's
Leo V. Mayer
Earl Orel Heady
Howard C. Madsen
出版
Center for Agricultural and Economic Development, Iowa State University
, 1968
URL
http://books.google.com.hk/books?id=ltiDNc6B7G4C&hl=&source=gbs_api