Columbia subject headings:
Harvard subject headings:
Education--Germany--History--20th century--Congresses.
Education--Germany--History--21st century--Congresses.
German literature--Study and teaching--History--20th century--Congresses.
German literature--Study and teaching--History--21st century--Congresses.
Princeton subject headings:
Education--Germany--History--20th century--Congresses.
Education--Germany--History--21st century--Congresses.
German literature--Study and teaching--History--20th century--Congresses.
German literature--Study and teaching--History--21st century--Congresses.