Columbia subject headings:
German language--History--Congresses.
German philology--Congresses.
Harvard subject headings:
German language--History--Congresses
German literature--History and criticism--Congresses
German philology--Congresses
Germany--Intellectual life--Congresses.
Germany--Relations--Congresses.
Princeton subject headings:
German language--History--Congresses.
German philology--Congresses.