Columbia subject headings:
Europe--Relations--Iran.
Iran--Relations--Europe.
Iran--Relations--United States.
Iran--Relations.
United States--Relations--Iran.
Harvard subject headings:
Europe--Relations--Iran.
Iran--Relations--Europe.
Iran--Relations--United States.
Iran--Relations.
United States--Relations--Iran.
Princeton subject headings:
Europe--Relations--Iran.
Iran--Relations--Europe.
Iran--Relations--Foreign countries.
Iran--Relations--United States.
United States--Relations--Iran.