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Proceedings of the Second Annual Meeting of the Poplar Council of Canada, August 19-22, 1980, Richmond, British Columbia
Poplar Council of Canada. Meeting
出版Poplar Council of Canada in conjunction with the Ontario Ministry of Natural Resources, 1981
URLhttp://books.google.com.hk/books?id=mzBzfnXr_48C&hl=&source=gbs_api