Columbia subject headings:
Harvard subject headings:
Decoration and ornament--Germany, Northern--Art nouveau.
Glass painting and staining--Germany, Northern--History--19th century.
Glass painting and staining--Germany, Northern--History--20th century.
Princeton subject headings:
Decoration and ornament--Germany, Northern--Art nouveau.
Glass painting and staining--Germany, Northern--History--19th century.
Glass painting and staining--Germany, Northern--History--20th century.