Saint Louis Art Museum, Bequest of Morton D. May 846:1983
Washington, National Gallery of Art. Gift (Partial and Promised) of Arnold and Joan Saltzman 2006.164.1
Sprengel Museum Hannover / Michael Herling / Aline Gwose
Berlin / Köln, Archiv Mayen Beckmann. Foto: Fotostudio Bartsch, Berlin