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Google圖書搜尋
Sugar Maple Veneer Logs Shoud be Graded for Pith Flecks
James C. Ward
Richard M. Marden
出版
Lake States Forest Experiment Station, U.S. Forest Service
, 1964
URL
http://books.google.com.hk/books?id=dB2iPgAACAAJ&hl=&source=gbs_api