Columbia subject headings:
Achaemenid dynasty, 559 B.C.-330 B.C.
Greece--Foreign relations--Iran.
Iran--Foreign relations--Greece.
Iran--History--To 640.
Harvard subject headings:
Achaemenid dynasty, 559-330 B.C.
Greece--Foreign relations--Iran.
Iran--Foreign relations--Greece.
Iran--History--To 640.
Princeton subject headings:
Achaemenid dynasty, 559-330 B.C.
Greece--Foreign relations--Iran.
Iran--Foreign relations--Greece.
Iran--History--To 640.