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Google圖書搜尋
An Economic Study of the Sweet Potato Enterprise in the North Louisiana Upland Cotton Area in 1943
Leo J. Fenske
John Norman Efferson
出版
Department of Agricultural Economics, Louisiana State University and Agricultural and Mechanical College, Agricultural Experiment Station
, 1945
URL
http://books.google.com.hk/books?id=AkYnAQAAMAAJ&hl=&source=gbs_api