Columbia subject headings:
Drawing--Private collections--Germany--Cologne--Catalogs.
Kollwitz, Käthe, 1867-1945--Catalogs.
Kreissparkasse Köln (Germany)--Art collections--Catalogs.
Harvard subject headings:
Princeton subject headings:
Drawing--Private collections--Germany (West)--Cologne--Catalogs.
Kollwitz, Käthe, 1867-1945--Catalogs.
Kreissparkasse Köln (Germany)--Art collections--Catalogs.