00916cam a22002771 4500 gs 66000238 DLC 20260227111419.0 830504s1966 dcu b f000 0 eng c gs 66000238 (OCoLC)9480003 U.S. Geol. Survey. Libr. CNoS CNoS DLC QE75 .C5 no. 530 TN271.P4 M28 Copy 2. McCulloh, Thane Hubert, 1926- Gravimetric effects of petroleum accumulations; a preliminary summary, by Thane H. McCulloh. Washington, 1966. iii, 4 p. 27 cm. Geological Survey circular 530 Bibliography: p. 4. Prospecting Geophysical methods. Gravity Measurement. Gravimeters (Geophysical instruments) Petroleum. United States. Geological Survey. Circular 530. 30230 30230