Columbia subject headings:
Harvard subject headings:
Catholic Church--Education--Germany--History--20th century.
Deutsches Institut für Wissenschaftliche Pädagogik--History.
Education--Study and teaching--Germany--History--20th century.
Princeton subject headings:
Catholic Church--Education--Germany--History--20th century.
Deutsches Institut für Wissenschaftliche Pädagogik--History.
Education--Study and teaching--Germany--History--20th century.