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Geology and Ore Deposits of the Creede District, Colorado, by William H. Emmons and Esper S. Larsen. [U.S. Geological Survey Bulletin 718.].

United States. Congress. House

出版	1921
URL	http://books.google.com.hk/books?id=ow35wQEACAAJ&hl=&source=gbs_api