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Saint Louis Art Museum, Bequest of Morton D. May 843:1983
San Francisco Museum of Modern Art, Gift of Louise S. Ackerman. Foto: Katherine Du Tiel
Collection Walker Art Center, Minneapolis. Gift of Mr. and Mrs. John Cowles, Sr. 1964
akg-images 5010389
Archiv Eigentümer(in) / Owner’s Archive. Foto: Peter Schälchli, Zürich