Columbia subject headings:
Political Science--Congresses.
Political Science--Terminology--Congresses.
Political science--Iran--Congresses.
Harvard subject headings:
Political science--Congresses
Political science--Iran--Congresses.
Political science--Terminology--Congresses.
Princeton subject headings:
Political science--Congresses.
Political science--Iran--Congresses.
Political science--Terminology--Congresses.