Columbia subject headings:
Europe, Eastern--History--1945-1989--Congresses.
Europe, Eastern--Politics and government--1945-1989--Congresses.
Nineteen fifty-six, A.D.--Congresses.
Soviet Union--History--1953-1985--Congresses.
Harvard subject headings:
Europe, Eastern--History--1945-1989--Congresses.
Europe, Eastern--Politics and government--1945-1989--Congresses.
Nineteen fifty-six, A.D.--Congresses.
Soviet Union--History--1953-1985--Congresses.
Princeton subject headings: