Columbia subject headings:
Soviet Union--Economic conditions.
Soviet Union--History.
Soviet Union--Politics and government.
Soviet Union--Social conditions.
Harvard subject headings:
Soviet Union--Economic conditions.
Soviet Union--History.
Soviet Union--Politics and government.
Soviet Union--Social conditions.
Princeton subject headings:
Soviet Union--Economic conditions.
Soviet Union--History.
Soviet Union--Politics and government.
Soviet Union--Social conditions.