Courtesy Thomas Ammann Fine Art AG
Bayerische Staatsgemäldesammlungen - Sammlung Moderne Kunst in der Pinakothek der Moderne München
Mark Ranney Memorial Fund 1946.1 - University of Iowa City Museum of Art. Reproduced with permission from The University of Iowa
Sprengel Museum Hannover / Aline Herling / Michael Herling / Benedikt Werner
Zürich, Kunsthaus
Photograph Courtesy of Sotheby's, Inc. © 2017
bpk / The Metropolitan Museum of Art
Courtesy Thomas Ammann Fine Art AG