| Federal and State Government Sites |
| American Gas Association |
http://www.aga.org |
| American Public Gas Association |
http://www.apga.org |
| American Public Works Association |
http://www.apwa.net |
| American National Standards Institute |
http://www.ansi.org |
| American Petroleum Institute |
http://www.api.org |
| American Society for Quality |
http://www.asq.org |
| ASM International, the materials information society |
http://www.asm-intl.org |
| ASTM International, standards worldwide |
http://www.astm.org |
| Common Ground Alliance |
http://www.commongroundalliance.com |
| Energy Association of Pennsylvania |
http://www.energypa.org |
| Gas Technology Institute |
http://www.gastechnology.org |
| Interstate National Gas Association of America |
http://www.ingaa.org |
| Midwest Energy Association |
http://www.midwestenergy.org |
| NACE International, the corrosion society |
http://www.nace.org |
| National Association of Regulatory Utility Commissioners |
http://www.naruc.org |
| National Fire Protection Association |
http://www.nfpa.org |
| National Propane Gas Association |
http://www.npga.org |
| Ohio Gas Association |
http://www.ohiogasassoc.org |
| Ohio Oil and Gas Association |
http://www.ooga.org |
| Plastics Pipe Institute |
http://www.plasticpipe.org |
| Southeastern Gas Association |
http://www.segas.org |
| Southern Gas Association |
http://www.southerngas.org |
