akg-images 3929242
Von der Heydt-Museum Wuppertal. Foto: Antje Zeis-Loi, Medienzentrum Wuppertal
Courtesy Thomas Ammann Fine Art AG
Mark Ranney Memorial Fund 1946.1 - University of Iowa City Museum of Art. Reproduced with permission from The University of Iowa
Minneapolis, Institute of Art
Seattle Art Museum, 55.74, Gift of Sidney and Anne Gerber