Berlin / Köln, Archiv Mayen Beckmann. Foto: Fotostudio Bartsch, Berlin
Photograph Courtesy of Sotheby's, Inc. © 2010
Courtesy Villa Grisebach, Berlin
Hilti Art Foundation, Schaan, Liechtenstein
Sidney, Art Gallery of New South Wales. Art Gallery of New South Wales Foundation Purchase 1987. 400.1987. Foto: AGNSW
Archiv Eigentümer(in) / Owner’s Archive. Foto: Peter Schälchli, Zürich