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Response to Commercial Thinning in a 110-year Old Douglas-fir Stand

Richard L. Williamson

出版	U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1982
URL	http://books.google.com.hk/books?id=Mw2Tb_N8wWcC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN