Columbia subject headings:
Art--Private collections--Germany--Berlin--Exhibitions.
Beuys, Joseph--Exhibitions.
Schlegel, Reinhard M.--Art collections--Exhibitions.
Harvard subject headings:
Art--Private collections--Germany--Exhibitions
Beuys, Joseph--Exhibitions.
Schlegel, Reinhard M.--Art collections--Exhibitions.
Princeton subject headings:
Beuys, Joseph--Exhibitions.
Schlegel, Reinhard M.--Art collections--Exhibitions.