Columbia subject headings:
Harvard subject headings:
Communism--Europe, Eastern--Congresses.
Communist state--Citizen participation--Congresses.
Communist state--Social aspects--Europe, Eastern--Congresses.
Dictatorship of the proletariat--Congresses.
Europe, Eastern--Politics and government--20th century--Congresses.
Soviet Union--Politics and government--Congresses.
Princeton subject headings:
Communism--Europe, Eastern--Congresses.
Communist state--Citizen participation--Congresses.
Communist state--Social aspects--Europe, Eastern--Congresses.
Dictatorship of the proletariat--Congresses.
Europe, Eastern--Politics and government--20th century--Congresses.
Soviet Union--Politics and government--20th century--Congresses.