• AAPG-American Assoc of Petroleum Geologists
  • AAPL - America's Landmen
  • American Geological Institute
  • American Petroleum Institute
  • API - Energy Tomorrow
  • Bloomberg Energy New
  • DOT National response center
  • Energy Information Administration
  • Geoart.com
  • Geology.com
  • Geological Society of America
  • How Stuff Works
  • IHS Energy Group
  • IOGCC - Interstate Oil & Gas Compact Commission
  • Illinois Department of Natural Resources
  • IOGA  - IL Oil & Gas Assoc
  • Illinois Oil Field Museum
  • Illinois Science Teachers Association
  • Illinois State Geological Survey (ISGS)
  • Independent Petroleum Assoc of America (IPAA)
  • Industrial 3D-Drilling Rig Animations
  • IL Oil and Gas Resource (ILOIL) Map Server
  • Nat’l Assoc. of Royalty Owners
  • OERB - OK Energy Resources Board
  • OPEC
  • Office of fossil fuel - US Dept of Energy
  • Ohio Oil & Gas Association
  • Shell
  • Society of Petroleum Engineers
  • USEPA
  • US Dept. of Energy
  • U. S. Geological Survey