MI-63 Geologic Sections Across Colorado (Tweto) (detail) MI-63 Geologic Sections Across Colorado (Tweto)
OF-15-06 Geologic Map of the Crawford Quadrangle OF-15-06 Geologic Map of the Crawford Quadrangle, Delta and Montrose Counties, Colorado
MS-17 Inventory of Nonmetallic Mining and Processing Operations in Colorado|MS-17 Inventory of Nonmetallic Mining and Processing Operations in Colorado MS-17 Inventory of Nonmetallic Mining and Processing Operations in Colorado
MS-24 Metal Mining Activity Map of Colorado and Directory MS-24 Metal Mining Activity Map of Colorado and Directory, 1984
MS-25 Metal Mining Activity Map of Colorado with Directory MS-25 Metal Mining Activity Map of Colorado with Directory, 1989