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The "bluing" and the "red Rot" of the Western Yellow Pine, with Special Reference to the Black Hills Forest Reserve

Hermann Von Schrenk

出版	U.S. Government Printing Office, 1903
URL	http://books.google.com.hk/books?id=qs4eAAAAIAAJ&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN