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A silvicultural guide for paper birch in the Northeast

David A. MarquisDale S. SolomonJohn C. Bjorkbom

出版	U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station, 1969
URL	http://books.google.com.hk/books?id=Hm2T9NXt5ccC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN