Annual statistical bulletin (Organization of Petroleum Exporting Countries : Online)
Annual statistical bulletin [elektronický zdroj]. -- Vienna, Austria : OPEC. -- Description based on: 2003; title from PDF cover (publishers website, viewed Nov. 20, 2009).. -- Latest issue consulted: 2008 (viewed Nov. 20, 2009).
Organization of Petroleum Exporting Countries
Organization of Petroleum Exporting Countries - Statistics - Periodicals. Petroleum industry and trade - Statistics - Periodicals