Columbia subject headings:
Harvard subject headings:
German philology--Study and teaching--Germany--History--20th century--Congresses.
German teachers--Training of--History--20th century--Congresses.
Teachers--Training of--Germany--History--20th century--Congresses.
Princeton subject headings:
Education--Germany--History--20th century.
German language--Study and teaching--Germany--History--20th century.
German literature--Study and teaching--Germany--History--20th century.
German teachers--Training of--Germany--History--20th century.
Teachers--Training of--Germany--History--20th century.