Columbia subject headings:
Europe--Relations--Persian Gulf States--Congresses.
Persian Gulf States--Relations--Europe--Congresses.
Persian Gulf States--Relations--United States--Congresses.
United States--Relations--Persian Gulf States--Congresses.
Harvard subject headings:
Europe--Relations--Persian Gulf States--Congresses.
Persian Gulf Region--Foreign relations.
Persian Gulf States--Relations--Europe--Congresses.
Persian Gulf States--Relations--United States--Congresses.
United States--Relations--Persian Gulf States--Congresses.
Princeton subject headings: