Courtesy Galerie Thomas, München
Saint Louis Art Museum, Bequest of Morton D. May 851:1983
Mildred Lane Kemper Art Museum, Washington University in St. Louis. University purchase, Kende Sale Fund, 1946.
Archiv Eigentümer(in) / Owner’s Archive. Foto: Peter Schälchli, Zürich
Courtesy Metropolitan Museum, New York (Sabine Rewald)