Columbia subject headings:
Harvard subject headings:
Teachers--Germany--Attitudes--Congresses.
Teachers--Germany--Political activity--Congresses.
Teachers--Training of--Germany (West)--Dortmund--Congresses.
Teachers--Training of--Germany (West)--Wesel (North Rhine-Westphalia)--History--Congresses.
Teachers--Training of--Germany--History--Congresses.
Teachers--Training of--Germany--Soest--Congresses.
Princeton subject headings:
Teachers in literature--Congresses.
Teachers--Training of--Germany--History--Congresses.