Columbia subject headings:
Communism--Europe--History.
Communist parties--Europe--History.
Post-communism--Europe--History.
Harvard subject headings:
Communism--Europe--History
Communism--Europe--History--Congresses.
Communist parties--Europe--History--Congresses.
Communist parties--Europe--History.
Political parties--Europe--History.
Post-communism--Europe--History--Congresses.
Post-communism--Europe--History.
Princeton subject headings:
Communism--Europe--History.
Communist parties--Europe--History.
Post-communism--Europe--History.