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Petroleum Companies |
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| BHP | www.bhp.com | |
| British Petroleum | www.bp.com | |
| Chevron | www.chevron.com | |
| Chinese Petroleum Corporation | www.cpc.com.tw | |
| The Coastal Corporation | www.coastalcorp.com | |
| Conoco | www.conoco.com | |
| ExxonMobil | www.exxon.mobil.com | |
| Gulf Oil Company | www.gulfoil.com | |
| Harken Energy Corporation | www.harkenenergy.com | |
| Kuwait National Petroleum | www.knpc.com.kw | |
| Marathon Oil Company | www.marathon.com | |
| Murphy Oil Corporation | www.murphyoilcorp.com | |
| Occidental Petroleum Corporation | www.oxy.com | |
| Oilfield.com | www.oilfield.com | |
| Petrobras | www.petrobras.com.br | |
| Petroleum Geology.net | www.petroleumgeology.net | |
| Petroleum Page.com | www.petroleumpage.com | |
| Phillips Petroleum | www.phillips66.com | |
| Shell | www.shell.com | |
| STAATSOLIE | www.staatsolie.com | |
| Statoil | www.statoil.com | |
| Texaco | www.texaco.com | |