Columbia subject headings:
Harvard subject headings:
Art, German--19th century--Düsseldorf.
Drawing, German--Germany--Düsseldorf.
Watercolor painting, German--Germany--Düsseldorf.
Princeton subject headings:
Catalogs.
Drawing, German--Catalogs.
Drawing--Germany--Düsseldorf--Catalogs.
Watercolor painting, German--Catalogs.
Watercolor painting--Germany--Düsseldorf--Catalogs.