Columbia subject headings:
Harvard subject headings:
Communism--Europe--History--20th century--Congresses.
Europe--History--1945---Congresses.
Government, Resistance to--Europe--History--20th century--Congresses.
Guerrilla warfare--Europe--History--20th century--Congresses.
Princeton subject headings:
Balkan Peninsula--History--1945-1989.
Cold War.
Europe, Eastern--Foreign relations--Soviet Union.
Europe, Eastern--History--1945-1989.
World War, 1939-1945--Europe, Eastern.