Archiv Eigentümer(in) / Owner’s Archive. Foto: Peter Schälchli, Zürich
Kansas City, Missouri, The Nelson-Atkins Museum of Art. Gift of the Friends of Art, 54-86. Image courtesy Nelson-Atkins Media Services / Photo: Jamison Miller
Saint Louis Art Museum, Bequest of Morton D. May 859:1983
Sprengel Museum Hannover, Kunstbesitz der Landeshauptstadt Hannover, Schenkung Volkswagenwerk GmbH, Wolfsburg (1956) / Ali
Seattle Art Museum, 55.74, Gift of Sidney and Anne Gerber