Columbia subject headings:
Harvard subject headings:
Communism--China--History--Congresses.
Communism--Europe, Eastern--History--Congresses.
Communism--Germany--History--Congresses.
Communism--Public opinion--Congresses.
Communist countries--Politics and government
Mass media--Political aspects--Congresses
Princeton subject headings:
Communist countries--Politics and government--Congresses.
Public opinion--Communist countries--Congresses.