Columbia subject headings:
Ivan IV, Czar of Russia, 1530-1584.
Kurbskiĭ, Andreĭ Mikhaĭlovich, kni︠a︡zʹ, -1583.
Russia--History--Ivan IV, 1533-1584--Sources.
Harvard subject headings:
Ivan IV, Czar of Russia, 1530-1584.
Kurbskiĭ, Andreĭ Mikhaĭlovich, kni͡azʹ, -1583.
Russia--History--Ivan IV, 1533-1584--Sources.
Princeton subject headings:
Ivan IV, Czar of Russia, 1530-1584--Sources.