Columbia subject headings:
Communication in social action.
Protest movements in mass media.
Protest movements.
Social movements.
Harvard subject headings:
Criticism--Congresses.
Nineteen sixty-eight, A.D.--Congresses.
Protest movements--Congresses.
Princeton subject headings:
Criticism--Congresses.
Nineteen sixty-eight, A.D.--Congresses.
Protest movements--20th century--Congresses.
Student movements--20th century--Congresses.