Columbia subject headings:
National security--United States.
Petroleum industry and trade--Government policy--United States.
Petroleum reserves--Government policy--United States.
Harvard subject headings:
National security--United States
Petroleum industry and trade--Government policy--United States
Petroleum reserves--Government policy--United States.
Princeton subject headings:
National security--United States.
Petroleum industry and trade--Government policy--United States.
Petroleum reserves--Government policy--United States.