Columbia subject headings:
Harvard subject headings:
Germany--History--20th century.
Nineteen sixty-eight, A.D.
Protest movements--Germany--History--20th century.
Social movements--Germany--History--20th century.
Princeton subject headings:
Germany--History--1945-1990.
Germany--Social conditions--20th century.
Nineteen sixty-eight, A.D.
Student movements--Germany--History--20th century.