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Silviculture of Aspen Forests in the Rocky Mountains and in the Southwest

Wayne D. Shepperd

出版	USDA Forest Service, Rocky Mountain Forest and Range Experiment Station, 1986
URL	http://books.google.com.hk/books?id=qHOap2RtrEQC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN