Columbia subject headings:
Harvard subject headings:
Achaemenid dynasty, 559-330 B.C.--Congresses.
Iran--Antiquities--Congresses.
Iran--History--Congresses.
Turkey--Antiquities--Congresses.
Turkey--History--Congresses
Princeton subject headings:
Achaemenid dynasty, 559 B.C.-330 B.C.--Congresses.
Iran--Antiquities--Congresses.
Iran--History--To 640--Congresses.
Turkey--Antiquities--Congresses.
Turkey--History--To 1453--Congresses.