Columbia subject headings:
Harvard subject headings:
Education--Study and teaching--Germany (West)--History.
Teachers--Training of--Germany (West)--History.
Princeton subject headings:
Pädagogische Akademie Köln--History--Sources.
Pädagogische Hochschule Köln--History--Sources.
Pädagogische Hochschule Rheinland. Abteilung Köln--History--Sources.