BLM New Mexico, Texas, Oklahoma, Kansas

http://www.blm.gov/nm/st/en.html

Bureau of Economic Geology

http://www.beg.utexas.edu/

East Texas Geological Society

http://www.easttexasgeo.com/publications.asp

East Texas SPE

http://easttexas.spe.org/

Gulf Coast Association of Geological Societies

http://www.gcags.org/

Louisiana Geological Survey

http://www.lgs.lsu.edu/

Railroad Commission of Texas

http://www.rrc.state.tx.us/

Region 6 EPA

http://www.epa.gov/region6/

Texas Independent Producers and Royalty Owners Association

http://www.tipro.org/

The Texas Commission on Environmental Quality.

http://163.234.20.106/index.html