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Corn Production

Frank P. CuthbertFrederick Vail WaughGeorge Frederick SpragueH. F. WintersJay R. BentleyGeorge W. MiskimenWilliam E. Larson

出版	Agricultural Research Service, U.S. Department of Agriculture, 1966
URL	http://books.google.com.hk/books?id=8cyeN25G0jAC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN