Columbia subject headings:
Economic development.
Organization of Petroleum Exporting Countries.
Petroleum industry and trade.
Harvard subject headings:
Developing countries--Economic policy.
Petroleum conservation--History.
Petroleum industry and trade--Developing countries
Petroleum industry and trade--Government policy--History.
Petroleum industry and trade--History
Petroleum industry and trade.
Princeton subject headings:
Petroleum conservation--History.
Petroleum industry and trade--Government policy--History.
Petroleum industry and trade--History.