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Google圖書搜尋
The Cost of Producing Wheat and Other Crops in North Dakota in 1919
Rex Ethan Willard
Edgar I. Olsen
Harlow Leslie Walster
John Henry Shepperd
Lawrence Root Waldron
O. A. Thompson
Perry Fox Trowbridge
W. L. Stockham
Emma Skeen
Hutzel Metzger
出版
Agricultural Experiment Station, the North Dakota Agricultural College
, 1920
URL
http://books.google.com.hk/books?id=Hy7DAQAACAAJ&hl=&source=gbs_api