© Staatsgalerie Stuttgart
Kunsthalle Bremen – Der Kunstverein in Bremen. Foto: Lars Lohrisch
Photograph Courtesy of Sotheby's, Inc. © 2010
Städel Museum, Frankfurt am Main - U. Edelmann / ARTOTHEK
Courtesy Stedelijk Museum Amsterdam
Mark Ranney Memorial Fund 1946.1 - University of Iowa City Museum of Art. Reproduced with permission from The University of Iowa