Columbia subject headings:
Marxian economics.
Soviet Union--Economic conditions.
Soviet Union--Economic policy.
Harvard subject headings:
Comparative economics.
Economic history--20th century
Marxian economics.
Socialism--History--20th century
Soviet Union--Economic conditions.
Soviet Union--Economic policy.
Princeton subject headings:
Comparative economics.
Economic history--20th century.
Marxian economics.
Soviet Union--Economic policy.