Columbia subject headings:
Iran--Foreign relations--United States.
Iran--History--1979-1997.
United States--Foreign relations--Iran.
Harvard subject headings:
Iran--Foreign relations--United States.
Iran--History--20th century
Iran--History--21st century.
United States--Foreign relations--Iran.
Princeton subject headings:
Iran--Foreign relations--United States.
Iran--History--1979-1997.
United States--Foreign relations--Iran.