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Results of Field Crop, Shelterbelt, and Orchard Investigations at the United States Dry Land Field Station, Ardmore, S. Dak, 1911-32
Oscar Roland Mathews
Verner Ivan Clark
出版
U.S. Department of Agriculture
, 1937
URL
http://books.google.com.hk/books?id=l1dn5WH61bkC&hl=&source=gbs_api
EBook
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