Columbia subject headings:
German language--Congresses.
German literature--History and criticism--Congresses.
Harvard subject headings:
German language--Congresses.
German literature--History and criticism--Congresses
Princeton subject headings:
German language--Bulgaria--Congresses.
German language--Germany--Congresses.
German language--Romania--Congresses.
German literature--History and criticism--Congresses.
German philology--Congresses.