Columbia subject headings:
Harvard subject headings:
Clergy--Germany--Cologne--Biography.
Historians--Germany--Cologne--Biography.
Nineteen sixty-eight, A.D.
Protest movements--Germany--Cologne--History--20th century.
Schmidt, Klaus, 1935-
Student movements--Germany--Cologne--History--20th century.
Princeton subject headings:
Clergy--Germany--Cologne--Biography.
Historians--Germany--Cologne--Biography.
Nineteen sixty-eight, A.D.
Protest movements--Germany--Cologne--History--20th century.
Schmidt, Klaus, 1935-
Student movements--Germany--Cologne--History--20th century.