Privatsammlung in der Hamburger Kunsthalle. Foto: Elke Walford
© 2018. Digital image, The Museum of Modern Art, New York / Scala, Florence
Courtesy Thomas Ammann Fine Art AG
New York, Museum of Modern Art (MoMA), Given anonymously (by exchange), 6.1942.a-c.© 2018. Digital image, The Museum of Modern Art, New York / Scala, Florence
Zürich, Kunsthaus