"Gas fields United States." . . "United States." . . "Advanced Resources International (Firm)." . . "National Energy Technology Laboratory (U.S.)" . . "Russia (Federation)" . . . "Geologic studies of deep natural gas resources" . "Geologic studies of deep natural gas resources"@en . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "Databases" . . . . "Discusses undiscovered technically recoverable natural gas in playas deeper than 15,000 feet in onshore regions of U.S. Also includes a chapter on potential for deep gas in former Soviet Union."@en . "Discusses undiscovered technically recoverable natural gas in playas deeper than 15,000 feet in onshore regions of U.S. Also includes a chapter on potential for deep gas in former Soviet Union." . . . . . . . . . . . . . "Discusses the undiscovered technically recoverable natural gas in plays deeper than 15,000 feet in onshore regions of the U.S." . . . . "Natural gas Geology Russia (Federation)" . . . . "Gas fields." . . "Gas Technology Institute." . . "Naravni plini Nahajališča Združene države Amerike Zemljevidi." . . "Yacimientos de gas natural Estados Unidos." . . "Gas fields Russia (Federation)" . . "Natural gas Geology." . . "Gaz naturel Géologie Russie Cédéroms." . . "Natural gas Geology United States." . . "United States. Geological Survey." . . "Yacimientos de gas natural URSS." . . "Naravni plini Nahajališča Rusija Zemljevidi." . . "Advanced Resources International." . . "Gisements de gaz Russie Cédéroms." . . "Gas natural Geología Rusia." . . "Gas natural Geología Estados Unidos." . . "Gaz naturel Géologie États-Unis Cédéroms." . . "Gisements de gaz États-Unis Cédéroms." . .