Columbia subject headings:
Energy policy--Europe, Western--History--20th century.
Energy policy--United States--History--20th century.
Petroleum industry and trade--Political aspects--Europe, Western--History--20th century.
Petroleum industry and trade--Political aspects--United States--History--20th century.
Harvard subject headings:
Energy policy--Europe, Western--History--20th century.
Energy policy--United States--History--20th century.
Petroleum industry and trade--Europe, Western--History--20th century.
Petroleum industry and trade--Government policy--Europe, Western--History--20th century.
Petroleum industry and trade--Government policy--United States--History--20th century.
Petroleum industry and trade--Political aspects--Europe, Western--History--20th century.
Petroleum industry and trade--Political aspects--United States--History--20th century.
Petroleum industry and trade--United States--History--20th century.
Sovereignty.
Princeton subject headings: