00534cam a2200205 4500 gs 67000263 DLC 20260227111421.0 690918s1967 dcua b 00000 eng c gs 67000263 //r85 U.S. Geol. Survey. Library TN270 .U5 622/.1 Geological Survey (U.S.) Suggestions for prospecting. [Washington, 1967] 24 p. illus. 24 cm. Bibliography: p. 22-24. Prospecting. 30358 30358