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Soil Erosion and Soil Conservation Policy Frontiers and Alternatives Based on Thirty Years of Adjustment and Detailed Study of the Problems in Western Iowa

Melvin G. BlaseR. Burnell HeldDon G. Miles

出版	University of Missouri-Columbia, Department of Agricultural Economics, 1984
URL	http://books.google.com.hk/books?id=yyX6HAAACAAJ&hl=&source=gbs_api