Columbia subject headings:
Iran--Foreign relations--United States.
Nuclear weapons--Iran.
Petroleum industry and trade--Political aspects--Iran.
United States--Foreign relations--Iran.
Harvard subject headings:
Iran--Foreign relations--United States.
Nuclear weapons--Iran
Petroleum industry and trade--Political aspects--Iran.
United States--Foreign relations--Iran.
Princeton subject headings:
Iran--Foreign relations--United States.
Nuclear weapons--Iran.
Petroleum industry and trade--Political aspects--Iran.
United States--Foreign relations--Iran.