Columbia subject headings:
Drawing, Dutch--Catalogs.
Drawing, Flemish--Catalogs.
Drawing--Germany--Cologne--Catalogs.
Wallraf-Richartz-Museum. Graphische Sammlung--Catalogs.
Harvard subject headings:
Drawing, Dutch--Catalogs.
Drawing, Flemish--Catalogs.
Drawing--Germany--Cologne--Catalogs.
Wallraf-Richartz-Museum. Graphische Sammlung--Catalogs.
Princeton subject headings:
Catalogs.
Drawing, Dutch--Catalogs.
Drawing, Flemish--Catalogs.
Drawing--Germany (West)--Cologne--Catalogs.
Wallraf-Richartz-Museum. Graphische Sammlung--Catalogs.