Columbia subject headings:
Exports--Iran--History--Sources.
Foreign exchange--Iran--History--Sources.
Imports--Iran--History--Sources.
Iran--Commerce--History--Sources.
Harvard subject headings:
Exports--Iran--History--Sources.
Foreign exchange--Iran--History--Sources.
Imports--Iran--History--Sources.
Princeton subject headings:
Exports--Iran--History--Sources.
Foreign exchange--Iran--History--Sources.
Imports--Iran--History--Sources.