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Monographs of the United States Geological Survey. Volume XXVII. [Geology of the Denver Basin in Colorado, by Samuel Franklin Emmons, Whitman Cross and George Homans Eldridge.].

United States. Congress. House

出版	Verlag nicht ermittelbar, 1897
URL	http://books.google.com.hk/books?id=M9pFuwEACAAJ&hl=&source=gbs_api