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Fertilizing Douglas-fir Forests

Richard E. MillerRoger D. Fight

出版	Pacific Northwest Forest and Range Expriment Station, U.S. Department of Agriculture, Forest Service, 1979
URL	http://books.google.com.hk/books?id=-2Z4ExNdw6oC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN