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Self-thinning and Stockability of the Circumboreal Aspens (Populus Tremuloides Michx., and P. Tremula L.)

Donald A. Perala

出版	U.S. Department of Agriculture, Forest Service, North Central Research Station, 1999
URL	http://books.google.com.hk/books?id=M9K6NN8oBrwC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN