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Proceedings of the IUFRO Joint Meeting of Working Parties, Vancouver, Canada, 1978: Background papers and Douglas fir provenances

International Union of Forestry Research Organizations

出版	B.C. Ministry of Forests, Information Services Branch, 1980
URL	http://books.google.com.hk/books?id=dCXxAAAAMAAJ&hl=&source=gbs_api