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Classification and Mapping of Agricultural Land for National Water-quality Assessment

Robert J. GilliomGail P. ThelinGeological Survey (U.S.)

出版	U.S. Government Printing Office, 1997
ISBN	06078680909780607868098
URL	http://books.google.com.hk/books?id=vZikv1r6PoIC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN

註釋

National Water-Quality Assessment Program.