Columbia subject headings:
Iran--Foreign relations--Persian Gulf States.
Iran--History--20th century.
Persian Gulf States--Foreign relations--Iran.
Harvard subject headings:
Iran--Foreign relations--Persian Gulf States.
Iran--History--20th century.
Persian Gulf States--Foreign relations--Iran.
Princeton subject headings:
Iran--Foreign relations--Persian Gulf States.
Iran--History--20th century.
Persian Gulf States--Foreign relations--Iran.