Columbia subject headings:
Harvard subject headings:
Frankfurt am Main (Germany)--Intellectual life--20th century--Biography--Congresses.
German literature--Study and teaching (Higher)--Germany--Frankfurt am Main--History--20th century--Congresses.
German philology--Study and teaching (Higher)--Germany--Frankfurt am Main--History--20th century--Congresses.
Universität Frankfurt am Main--Faculty--History--Congresses.
Princeton subject headings:
Literature--Study and teaching--Germany--Frankfurt am Main--History--Congresses.