01273cam a22003251 4500 gs 65000368 DLC 20260227111417.0 780722s1966 dcuab b f000 0 eng gs 65000368 (OCoLC)4075583 DLC OClU OCoLC DLC premarc TN24.C6 M6 no. 1208 553.0978861 Moench, Robert Hadley, 1926- Economic geology of the Idaho Springs district, Clear Creek and Gilpin Counties, Colorado, by Robert H. Moench and Avery Ala Drake, Jr. Washington, U.S. Govt. Print. Off., 1966. v, 91 p. illus., maps (part col.) 24 cm. U.S. Geological Survey. Bulletin, 1208 Part of illustrative matter folded in pocket. Prepared on behalf of the U.S. Atomic Energy Commission. Bibliography: p. 89-91. Geology, Economic Colorado Idaho Springs Region. Ore deposits Colorado Idaho Springs Region. Mines and mineral resources Colorado Idaho Springs Region. Drake, Avery Ala, 1927- joint author. U.S. Atomic Energy Commission. Geological Survey bulletin. 1280 30110 30110