01027cam a22002771i 4500 gs 35000083 DLC 20260227111339.0 790319s1935 dcudf f001 0 eng gs 35000083 (OCoLC)4753414 DLC CoU-DA OCoLC DLC premarc TN443.A5 R6 I 19.16:179 Ross, Clarence Samuel, 1880- Origin of the copper deposits of the Ducktown type in the southern Appalachian region / by Clarence S. Ross. Washington : U.S. Gov't. Print. Off., 1935 v, 165 p. : ill., 44 plates ; 29 cm. Geological Survey (U.S.). Geological Survey professional paper ; no. 179 At head of title: United States Department of the Interior. Bibliography: p. 3-7. Copper mines and mining Appalachian Region. Copper ores Appalachian Region. Geological Survey professional paper ; no. 179. 27173 27173