Columbia subject headings:
Persian Gulf Region--Foreign relations--United States.
Persian Gulf Region--Strategic aspects.
United States--Foreign relations--Persian Gulf Region.
Harvard subject headings:
Persian Gulf Region--Foreign economic relations--United States.
Persian Gulf Region--Foreign relations--United States.
United States--Foreign economic relations--Persian Gulf Region.
United States--Foreign relations--Persian Gulf Region.
Princeton subject headings:
Persian Gulf Region--Foreign relations--United States.
Persian Gulf Region--Strategic aspects.
United States--Foreign relations--Persian Gulf Region.