Columbia subject headings:
Iran--History--To 640.
Kavdh I, King of Persia, 488-531.
Zoroastrianism.
Harvard subject headings:
Communism--Iran--History.
Iran--History--To 640.
Kavadh I, King of Iran, -531.
Kavdh I, King of Persia, 488-531.
Mazdakites.
Zoroastrianism
Princeton subject headings:
Communism--Iran--History.
Iran--History--To 640.
Kavādh I, King of Iran, -531.
Mazdakites.