Columbia subject headings:
History, Modern--1945-1989--Congresses.
Nineteen sixty-eight, A.D.--Congresses.
Protest movements--History--20th century--Congresses.
Social movements--History--20th century--Congresses.
World politics--1965-1975--Congresses.
Harvard subject headings:
Princeton subject headings:
History, Modern--1945-1989--Congresses.
Nineteen sixty-eight, A.D.--Congresses.
Protest movements--History--20th century--Congresses.
Social movements--History--20th century--Congresses.
World politics--1965-1975--Congresses.