Columbia subject headings:
Harvard subject headings:
Collectivism--Soviet Union--History--20th century.
Industries--Soviet Union--History
Soviet Union--Economic conditions--1917-1945.
Working class--Soviet Union--History--20th century.
Princeton subject headings:
Collectivism--Soviet Union--History--20th century.
Industries--Soviet Union--History.
Soviet Union--Economic conditions--1917-1945.
Working class--Soviet Union--History--20th century.