KELLER, George V. Directional resistivity measurements in exploration for Uranium deposits on the Colorado Plaateau / by George V. Keller. -- Washington : United States Government Printing Office, 1959 - P. 37-71. -- (Geological Survey Bulletin ; 1083-B). Subjects--Topical Terms: ColoradoGeofísica Universal Decimal Class. No.: 550.3(788)