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The Significance of the Discolorations in Aircraft Lumber, Noble Fir and Western Hemlock

George Henry Englerth

出版	United States Department of Agriculture, Agricultural Research Administration, Bureau of Plant Industry, Soils, and Agricultural Engineering, Division of Forest Pathology, 1945
URL	http://books.google.com.hk/books?id=BBqePQAACAAJ&hl=&source=gbs_api