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Log and Lumber Grades as Indicators of Wood Quality in 20- to 100-year-old Douglas-fir Trees from Thinned and Unthinned Stands
R. James BarbourDean L. Parry
出版U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station, 2001
URLhttp://books.google.com.hk/books?id=boAzYanlYPMC&hl=&source=gbs_api
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