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