Columbia subject headings:
Communism--Soviet Union--History--20th century.
Kommunisticheskai͡a partii͡a Sovetskogo Soi͡uza--History.
Soviet Union--Politics and government.
Harvard subject headings:
Communism--Soviet Union--History
Kommunisticheskai︠a︡ partii︠a︡ Sovetskogo Soi︠u︡za--History.
Soviet Union--Politics and government--1917-1936.
Princeton subject headings:
Communism--Soviet Union--History--20th century.
Kommunisticheskai︠a︡ partii︠a︡ Sovetskogo Soi︠u︡za--History.
Soviet Union--Politics and government.