00237nam a2200097Ia 450000500170000024500240001726000530004158300220009494200060011699900170012220260716043921.0  aPETROLEUM ECONOMIST  bThe Petroleum Economist Ltd.aLondon, EC4V 5EXGB  c11/20/08kEVELYND  cS  c56779d56779