Columbia subject headings:
Persian Gulf Region--Description and travel.
Persian Gulf Region--History.
Persian Gulf Region--Politics and government--21st century.
Harvard subject headings:
Persian Gulf Region--Description and travel.
Persian Gulf Region--History
Persian Gulf Region--Politics and government--21st century.
Princeton subject headings:
Persian Gulf Region--Description and travel.
Persian Gulf Region--History.
Persian Gulf Region--Politics and government--21st century.