Columbia subject headings:
Russia--History--1533-1613.
Russia--History--1613-1689.
Russia--History--To 1533.
Soviet Union--History--Sources.
Harvard subject headings:
Russia--History--1533-1613.
Russia--History--1613-1689.
Russia--History--Sources.
Russia--History--To 1533.
Soviet Union--History.
Princeton subject headings:
Russia--History--1533-1613.
Russia--History--1613-1689.
Russia--History--To 1533.
Soviet Union--History--Sources.