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American Petroleum Institute

The Barnett Powering Progress

The Barnett Shale Energy Education Council

Commercial Vehicle Safety Alliance

Commodity Prices

Energy in Depth

Environmental Protection Agency

Federal Motor Carrier Safety Administration

Independent Petroleum Association of America

International Fuel Tax Association (IFTA)

International Registration Plan (IRP)


Oklahoma Corporation Commission

Oklahoma Department of Transportation

Oklahoma Independent Petroleum Association

Permian Basin Petroleum Association


Prague Chamber of Commerce

State Chamber of Oklahoma

Texas Alliance of Energy Producers

Texas Independent Producers and Royalty Owners Association

Tulsa Regional Chamber of Commerce

U.S. Department of Energy

U.S. Energy Information Administration