Columbia subject headings:
Socialism--Russia (Federation)
Socialism--Russia--History--20th century.
Socialism--Soviet Union--History.
Harvard subject headings:
Socialism--Russia (Federation)
Socialism--Russia (Federation)--History.
Socialism--Russia--History
Socialism--Russia--History--20th century.
Socialism--Russia.
Socialism--Soviet Union
Socialism--Soviet Union--History
Princeton subject headings:
Socialism--Russia (Federation)
Socialism--Russia--History.
Socialism--Soviet Union--History.