01052cam a22002771 4500 gs 66000254 DLC 20260227111419.0 830504s1966 dcua b f000 0 eng c gs 66000254 (OCoLC)9480039 U.S. Geol. Survey. Libr. CNoS CNoS DLC premarc QE75 .C5 no. 531 McCulloh, Thane Hubert, 1926- The promise of precise borehole gravimetry in petroleum exploration and exploitation, by Thane H. McCulloh. Washington, 1966. iii, 12 p. illus. 27 cm. Geological Survey circular 531 "A paper presented at the Third Symposium on the Development of Petroleum Resources of Asia and the Far East, ECAFE, Tokyo, Japan, November 1965." Bibliography: p. 11-12. Petroleum Research. Prospecting Geophysical methods. Gravimeters (Geophysical instruments) Geological Survey (U.S.). Circular 531. 30241 30241