- / ARTOTHEK
2010 Christie's Images Limited
Collection Walker Art Center, Minneapolis. Gift of Mr. and Mrs. John Cowles, Sr. 1964
© Staatsgalerie Stuttgart
New York, Moeller Fine Art
Hamburger Kunsthalle. Foto: Elke Walford
akg-images 255323
akg-images 5010389
Archiv Eigentümer(in) / Owner’s Archive. Foto: Peter Schälchli, Zürich