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Mechanical Grading of 6-inch-diameter Lodgepole Pine Logs for the Traveler's Rest and Rattlesnake Creek Bridges

David William Green

出版	U.S. Department of Agriculture, Forest Service, Forest Products Laboratory, 2005
URL	http://books.google.com.hk/books?id=Or1WgSz6hr0C&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN