Columbia subject headings:
Balance of payments.
Energy consumption--Economic aspects.
Energy consumption--Political aspects.
Energy policy.
International economic relations.
Petroleum industry and trade.
Harvard subject headings:
Balance of payments.
Energy consumption--Economic aspects.
Energy consumption--Political aspects.
Energy policy
International economic relations.
Petroleum industry and trade.
Princeton subject headings:
Balance of payments.
Energy consumption--Economic aspects.
Energy consumption--Political aspects.
Energy policy.
International economic relations.
Petroleum industry and trade.