Columbia subject headings:
Ivan IV, Czar of Russia, 1530-1584.
Russia--History--Ivan IV, 1533-1584.
Harvard subject headings:
Ivan IV, Czar of Russia, 1530-1584.
Russia--History--Ivan IV, 1533-1584.
Princeton subject headings:
Ivan IV, Czar of Russia, 1530-1584.
Russia--History--Ivan IV, 1533-1584.