Title: The seven sisters
Subjects: History, Petroleum industry and trade, General, Political Freedom & Security - Law Enforcement, Political Science, Biography / Autobiography, Petroleum industry and trade, history, Industrie pétrolière, Géopolitique, Multinationales, Organisation des pays exportateurs de pétrole, Petroleum industry, Plot-your-own stories, Adventure fiction, Petroleum industry and trade -- History, Pťrole, Industrie et commerce, Histoire