00860cam a22002651 4500 gs 61000194 DLC 20260227111410.0 740808s1960 dcuab b f000 0 eng c gs 61000194 (OCoLC)974379 U.S. Geol. Survey. Libr. OKentU OCoLC ISS DLC QE75 .P9 no. 373 QE33 .R35 I 19.16:373 Ray, Richard G. (Richard Godfrey), 1920- Aerial photographs in geologic interpretation and mapping. Washington, U.S. Govt. Print. Off., 1960. vi, 230 p. illus., maps, diagrs. 30 cm. Geological Survey (U.S.). Professional paper 373 Bibliography: p. 224-227. Aerial photography. Photographic surveying. Geology Maps. 29537 29537