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Report of Progress in the Geological Resurvey of the Cripple Creek District, Colorado, by Waldemar Lindgren and Frederick Leslie Ransome. [U.S. Geological Survey Bulletin No. 254. Series A, Economic Geology, 49. Series B, Descriptive Geology, 61.].

United States. Congress. HouseWaldemar Lindgren

出版	U.S. Government Printing Office, 1904
URL	http://books.google.com.hk/books?id=cwULSQAACAAJ&hl=&source=gbs_api