00000cas a22000003a 4500 UP-99796217611460321 Buklod 20141030151518.0 a grb 001 u| ta 141030s xx d | ||r ||||| || 0474-6279 (iLib)UPD-00237705300 DENG eng Organization of Petroleum Exporting Countries. OPEC bulletin. Vienna Austria Organization of the Petroleum Exporting Countries v. ill. Organization of Petroleum Exporting Countries -- Periodicals. Petroleum industry and trade -- Periodicals. Organization of Petroleum Exporting Countries. FO Serial UPD DENG Continuing Resource