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Investigations in Erosion Control and Reclamation of Eroded Shelby and Related Soils at the Conservation Experiment Station, Bethany, Mo., 1930-42

Dwight David Smith

出版	U.S. Department of Agriculture, 1945
URL	http://books.google.com.hk/books?id=o7Uqnxa4vesC&hl=&source=gbs_api