Australian Petroleum Production & Exploration Association
Canadian Association of Petroleum Producers
Independent Petroleum Association of America
International Association of Oil & Gas Producers
Arkansas Independent Producers & Royalty Owners
California Independent Petroleum Association
Colorado Oil & Gas Association
Eastern Kansas Oil & Gas Association
Illinois Oil & Gas Association
Independent Oil & Gas Association of West Virginia
Independent Oil & Gas Association of New York
Independent Oil & Gas Association of Pennsylvania
Independent Petroleum Association of Mountain States
Independent Petroleum Association of New Mexico
Kansas Independent Oil & Gas Association
Kentucky Oil & Gas Association
Louisiana Oil & Gas Association
Michigan Oil & Gas Association
Mississippi Independent Producers and Royalty Owners
National Association of Royalty Owners
National Stripper Well Association
New Mexico Oil & Gas Association
Northern Alliance of Independent Producers
North Dakota Petroleum Council
Oklahoma Independent Petroleum Association
Panhandle Producers & Royalty Owners Association
Pennsylvania Oil & Gas Association
Permian Basin Petroleum Association
Petroleum Association of Wyoming
Texas Alliance of Energy Producers
