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Ranking Treatment Opportunities in Existing Timber Stands on White Pine Land in the Northern Region

John H. WikstromJack R. Alley

出版	Intermountain Forest & Range Experiment Station, Forest Service, U.S. Department of Agriculture, 1968
URL	http://books.google.com.hk/books?id=UoNY0AEACAAJ&hl=&source=gbs_api