Columbia subject headings:
Europe--History--1945---Congresses.
Europe--Politics and government--1945---Congresses.
Nineteen sixty-nine, A.D.--Congresses.
World politics--1965-1975--Congresses.
Harvard subject headings:
Europe--History--1945---Congresses.
Europe--Politics and government--1945---Congresses.
Nineteen sixty-nine, A.D.--Congresses.
World politics--1965-1975--Congresses
Princeton subject headings: