Columbia subject headings:
Harvard subject headings:
Communism--Russia (Federation)--History.
Kommunisticheskai͡a partii͡a Rossiĭskoĭ Federat͡sii--Congresses--History.
Kommunisticheskai︠a︡ partii︠a︡ Sovetskogo Soi︠u︡za--Congresses.
Kommunisticheskai︠a︡ partii︠a︡ Sovetskogo Soi︠u︡za. Sʺezd (20th : 1956 : Moscow, Russia)
Political parties--Russia (Federation)--History
Russia (Federation)--Politics and government--History.
Princeton subject headings:
Kommunisticheskai︠a︡ partii︠a︡ Sovetskogo Soi︠u︡za. Sʺezd (20th : 1956 : Moscow, R.S.F.S.R.)
Soviet Union--Politics and government--1953-1985.