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