Columbia subject headings:
Persian Gulf Region--Politics and government.
Persian Gulf Region--Strategic aspects.
Petroleum industry and trade--Political aspects--Persian Gulf Region.
Harvard subject headings:
Persian Gulf Region--Politics and government.
Persian Gulf Region--Strategic aspects.
Petroleum industry and trade--Political aspects--Persian Gulf Region.
Princeton subject headings:
Persian Gulf Region--Politics and government.
Persian Gulf Region--Strategic aspects.
Petroleum industry and trade--Political aspects--Persian Gulf Region.