00999cam a2200277 4500 gs 68000342 DLC 20260227111423.0 690603s1968 dcuab b 00110 eng c gs 68000342 //r882 U.S. Geological Survey Library QE75 .P9 no. 610 TN423.A5 K6 Copy 2. 553/.41/0973 Koschmann, Albert Herbert, 1896-1962. Principal gold-producing districts of the United States, by A. H. Koschmann and M. H. Bergendahl. Washington, U.S. Dept. of the Interior, 1968. v, 283 p. illus., maps. 30 cm. 4.75 Geological Survey professional paper 610 Bibliography: p. 263-276. Gold mines and mining United States. Gold ores United States. Bergendahl, M. H. (Maximilian Hilmar), 1921- joint author. Geological Survey professional paper ; 610. 30541 30541