00904cam a2200253 4500 gs 68000381 DLC 20260227111423.0 690714s1968 dcuab 000 0 eng c gs 68000381 U.S. Geological Survey Library DLC DLC QE75 .C5 no. 592 TN413.C7 F5 Copy 2. 622/.18/41 Fischer, Richard Philip, 1910- Interpreting pan-concentrate analyses of stream sediments in geochemical exploration for gold, by R. P. Fischer and F. S. Fisher. Washington, 1968. iii, 9 p. illus., map. 26 cm. United States. Geological Survey. Circular 592 Gold ores San Juan Mountains. Geochemical prospecting. Fisher, Frederick S., 1937- joint author. Geological Survey circular ; 592. 30562 30562