Columbia subject headings:
Communism--Soviet Union--History.
Dialectical materialism.
Socialism--Soviet Union.
Soviet Union--Economic policy.
Soviet Union--Politics and government.
Harvard subject headings:
Communism--Soviet Union--History
Dialectical materialism.
Socialism--Soviet Union
Socialism--Soviet Union--History
Soviet Union--Economic policy.
Soviet Union--Politics and government.
Princeton subject headings:
Communism and society.
Soviet Union--Social conditions--1970-1991.