Columbia subject headings:
Middle East--Civilization--To 622--Sources.
Middle East--History--To 622--Sources.
Middle East--Study and teaching.
Harvard subject headings:
Achaemenid dynasty, 559-330 B.C.
Middle East--History--To 622.
Princeton subject headings:
Achaemenid dynasty, 559-330 B.C.
Middle East--History--To 622.