Columbia subject headings:
Harvard subject headings:
Iran--History--20th century--Congresses.
Iran--History--Revolution, 1979--Congresses.
Iran--Politics and government--20th century--Congresses.
Islam and politics--Iran--Congresses.
Princeton subject headings:
Iran--History--20th century.
Iran--History--Revolution, 1979.
Iran--Politics and government--20th century.
Islam and politics--Iran.