Columbia subject headings:
Art--Private collections--Germany--Düsseldorf.
Beuys, Joseph.
Ulbricht, Günter, Dr.--Art collections.
Harvard subject headings:
Art--Germany--Düsseldorf--Catalogs.
Art--Private collections--Germany--Düsseldorf--Catalogs.
Beuys, Joseph--Catalogs.
Kunstsammlung Nordrhein-Westfalen (Germany)--Catalogs.
Ulbricht, Günter, Dr.--Art collections--Catalogs.
Princeton subject headings:
Art--Germany--Düsseldorf--Catalogs.
Art--Private collections--Germany--Düsseldorf--Catalogs.
Beuys, Joseph--Catalogs.
Kunstsammlung Nordrhein-Westfalen (Germany)--Catalogs.
Ulbricht, Günter, Dr.--Art collections--Catalogs.