Collection Albright-Knox Art Gallery, Buffalo, New York. Room of Contemporary Art Fund, 1950 (RCA1950:1). Foto: Tom Loonan
Washington D. C., Smithsonian Institution, Hirshorn Museum and Sculpture Garden. Gift of the Joseph H. Hirshhorn Foundation, 1966. Foto: Lee Stalsworth
Städel Museum, Frankfurt am Main - U. Edelmann / ARTOTHEK