Columbia subject headings:
Harvard subject headings:
Art, German--Congresses.
Arts, German--19th century.
Arts, German--20th century.
German literature--19th century--History and criticism--Congresses.
German literature--20th century--History and criticism--Congresses.
Princeton subject headings:
Arts, German.
Arts, Modern--19th century--Germany.
Arts, Modern--20th century--Germany.