Columbia subject headings:
Energy consumption--United States.
Energy policy--United States.
National security--Western Hemisphere.
Petroleum industry and trade--Political aspects--Western Hemisphere.
United States--Foreign relations--Western Hemisphere.
Western Hemisphere--Foreign relations--United States.
Harvard subject headings:
Energy consumption--United States.
Energy policy--United States
National security--Western Hemisphere.
Petroleum industry and trade--Political aspects--Western Hemisphere.
United States--Foreign relations--Western Hemisphere.
Western Hemisphere--Foreign relations--United States.
Princeton subject headings:
Energy consumption--United States.
Energy policy--United States.
National security--Western Hemisphere.
Petroleum industry and trade--Political aspects--Western Hemisphere.
United States--Foreign relations--Western Hemisphere.
Western Hemisphere--Foreign relations--United States.