Publications
WTRG Economics   www.wtrg.com
Oil & Gas Journal   www.ogj.com
Oil and Gas Investor   www.oilandgasinvestor.com
Rigzone   www.rigzone.com

Professional Associations
American Association of Petroleum Geologists    www.aapg.org
Independent Petroleum Association of America   www.ipaa.org
Petroleum Technology Transfer Council  www.pttc.org
American Association of Professional Landmen   www.landman.org