Columbia subject headings:
Iran--Foreign relations--Rome.
Iran--Foreign relations--To 640.
Rome--Foreign relations--30 B.C.-476 A.D.
Rome--Foreign relations--Iran.
Sassanids.
Harvard subject headings:
Iran--Foreign relations--Rome.
Rome--Foreign relations--30 B.C.-476 A.D.
Rome--Foreign relations--Iran.
Sassanids.
Princeton subject headings:
Iran--Foreign relations--Rome.
Rome--Foreign relations--30 B.C.-476 A.D.
Rome--Foreign relations--Iran.
Sassanids.