Columbia subject headings:
Rhineland (Germany)--Intellectual life--20th century.
Rhineland (Germany)--Social life and customs.
Harvard subject headings:
Art--Germany--Rhineland--History.
Arts--Germany--Rhineland--History--20th century.
German literature--Germany--Rhineland--History and criticism--20th century.
Rhineland (Germany)--Intellectual life--20th century.
Princeton subject headings: