Columbia subject headings:
Harvard subject headings:
Glass painting and staining--Germany--Catalogs.
Glass painting and staining--Germany--Cologne--Catalogs.
Schnütgen-Museum--Catalogs.
Princeton subject headings:
Glass painting and staining--Germany (West)--Cologne--Catalogs.
Glass painting and staining--Germany--Catalogs.
Schnütgen-Museum--Catalogs.