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
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
B-02 Geology of the Grayback Mining District B-02 Geology of the Grayback Mining District, Costilla County, Colorado