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