Courtesy Galerie Thomas, München
Mildred Lane Kemper Art Museum, Washington University in St. Louis. University purchase, Kende Sale Fund, 1946.
Zürich, Kunsthaus
Archiv Eigentümer(in) / Owner’s Archive. Foto: Peter Schälchli, Zürich
Collection Albright-Knox Art Gallery, Buffalo, New York. Room of Contemporary Art Fund, 1950 (RCA1950:1). Foto: Tom Loonan