Columbia subject headings:
Bishops--Germany--Biography.
Church and social problems--Catholic Church.
Ketteler, Wilhelm Emmanuel, Freiherr von, 1811-1877.
Harvard subject headings:
Bishops--Germany--Biography
Church and social problems--Catholic Church
Ketteler, Wilhelm Emmanuel, Freiherr von, 1811-1877.
Princeton subject headings:
Bishops--Germany--Biography.
Church and social problems--Catholic Church.
Ketteler, Wilhelm Emmanuel, Freiherr von, 1811-1877.