American Petroleum Institute, geoGeological horizons, new approaches, education:Shrock, logical research program:... B. N., 17. Specialization: Link, T. A. , 14. Arizona, northern, oil and gas Geological research on ore...L., 4. Gilbert H., 10. Colorado, South Silverton area: Expanding horizons: Lay, R. L.,L Geophysicist in...the future: Just, E. ing: Burwell, E. B., Jr., 4. Mining geology, retrospect and Index fossils: Stephenson...Mexico, Paricutin ash deposits, Ore detection by new devices: facies: Dorf, E., 1. Bilicke, W. Petroleum |