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Bibliography of North American Geology
出版U.S. Government Printing Office, 1966
URLhttp://books.google.com.hk/books?id=u9U1NicqGo4C&hl=&source=gbs_api
EBookFULL_PUBLIC_DOMAIN
註釋1919/28 cumulation includes material previously issued in the 1919/20-1935/36 issues and also material not published separately for 1927/28. 1929/39 cumulation includes material previously issued in the 1929/30-1935/36 issues and also material for 1937-39 not published separately.