Columbia subject headings:
Harvard subject headings:
Achaemenid dynasty, 559-330 B.C.--Religion.
Avesta--Influence.
Indo-Iranians--Religion.
Iran--History--To 640.
Iran--Religion.
Zoroastrianism
Princeton subject headings:
Achaemenid dynasty, 559-330 B.C.--Religion.
Indo-Iranians--Religion.