The Texas Railroad Commission
http://www.rrc.state.tx.us/

New Mexico Energy, Minerals and Natural Resources Department http://www.emnrd.state.nm.us/ocd/Rules.htm

Oklahoma Corporation Commission - Oil and Gas Conservation Division
http://www.occ.state.ok.us/Divisions/OG/Og.htm

Kentucky Division of Oil and Gas Conservation
http://www.dogc.ky.gov/

Tennessee State Oil and Gas Board
http://www.state.tn.us/sos/rules/1040/1040.htm

Mississippi State Oil & Gas Board
http://www.ogb.state.ms.us/

World Oil
http://www.worldoil.com/

Society of Petroleum Engineers (SPE)
http://www.spe.org/spe-app/spe/index.jsp

San Antonio Chapter of the SPE
http://balcones.spe.org/

American Petroleum Institute (API)
http://www.api.org/

San Antonio Chapter of the API
http://www.sanantonioapispe.com/

Oil & Gas Journal
http://www.ogj.com/index.cfm