P. K. Theobald

1928

• Energy resources of the United States
• Geochemical prospecting with heavy-mineral concentrates used to locate a tungsten deposit
• Minor elements in alluvial magnetite from the Inner Piedmont belt, North and South Carolina
• Platinum and associated elements at the New Rambler mine and vicinity, Albany and Carbon Counties, Wyoming
• Statistical parameters for resource evaluation of geochemical data from the Ajo 1
• Statistical parameters for resource evaluation of geochemical data from the Ajo 1?□x 2?□quadrangle, Arizona
• Statistical parameters for resource evaluation of geochemical data from the Ajo 1p0s
• The gold pan as a quantitative geologic tool