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Google圖書搜尋
Machinery Costs on Typical Wheat Farms in North Eastern South Dakota
Erwin O. Ullrich
Wallace G. Aanderud
John T. Sanderson
其他書名
Beadle, Clark, Codington, Day, Marshall, Roberts Counties
出版
South Dakota State University, Agricultural Experiment Station, Department of Economics
, 1968
URL
http://books.google.com.hk/books?id=DqkIjjSNiXoC&hl=&source=gbs_api