Columbia subject headings:
Europe, Eastern--History--20th century--Sources.
Europe, Eastern--Politics and government--1945-1989--Sources.
Former communist countries--History--Sources.
Post-communism.
Harvard subject headings:
Europe, Eastern--History--20th century--Sources.
Europe, Eastern--Politics and government--1945-1989--Sources.
Former communist countries--History--Sources.
Post-communism.
Princeton subject headings:
Europe, Eastern--History--20th century--Sources--Congresses.
Europe, Eastern--Politics and government--1945-1989--Sources--Congresses.
Former communist countries--History--Sources--Congresses.
Post-communism--Congresses.