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Height Growth and Site Index Curves for Douglas-fir on Dry Sites in the Willamette National Forest

出版	U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1985
URL	http://books.google.com.hk/books?id=5kf9psDtPAIC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN