Columbia subject headings:
Harvard subject headings:
Persian Gulf Region--Foreign relations--Iran.
Persian Gulf Region--Foreign relations--Iraq.
Persian Gulf Region--Foreign relations--United States.
Persian Gulf Region--Politics and government.
Persian Gulf Region--Strategic aspects.
Petroleum industry and trade--Political aspects--Persian Gulf Region.
Political stability--Persian Gulf Region.
Princeton subject headings:
Persian Gulf Region--Politics and government.
Persian Gulf Region--Strategic aspects.