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Google圖書搜尋
Variation in Density of Sugar Maple Sapwood and Hardwood
Fred M. Lamb
Richard M. Marden
出版
U.S. Department of Agriculture, Forest Service, North Central Forest Experiment Station
, 1970
URL
http://books.google.com.hk/books?id=OUjGtgAACAAJ&hl=&source=gbs_api