Columbia subject headings:
National security--Persian Gulf Region.
Persian Gulf Region--Foreign relations.
Persian Gulf Region--Politics and government--20th century.
Petroleum industry and trade--Government policy--Persian Gulf Region.
Harvard subject headings:
National security--Persian Gulf Region
Persian Gulf Region--Foreign relations.
Persian Gulf Region--Politics and government--20th century.
Petroleum industry and trade--Government policy--Persian Gulf Region.
Princeton subject headings:
National security--Persian Gulf Region.
Persian Gulf Region--Foreign relations.
Persian Gulf Region--Politics and government--20th century.
Petroleum industry and trade--Government policy--Persian Gulf Region.