IS-25 Selected References on the Geology and Coal Resources of the Central and Western Colorado Coal Fields and Regions IS-25 Selected References on the Geology and Coal Resources of the Central and Western Colorado Coal Fields and Regions
MS-13 State Lands Status Map: Lands and Minerals Administered by Agencies of the Colorado Department of Natural Resources MS-13 State Lands Status Map: Lands and Minerals Administered by Agencies of the Colorado Department of Natural Resources
MS-10 Metal Mining Activity Map of Colorado Excluding Uranium and Vanadium (with Directory) MS-10 Metal Mining Activity Map of Colorado Excluding Uranium and Vanadium (with Directory), 1978
MS-11 Map and Directory of Colorado Uranium and Vanadium Mining and Milling Activities (detail) MS-11 Map and Directory of Colorado Uranium and Vanadium Mining and Milling Activities