San Francisco Museum of Modern Art, Gift of Louise S. Ackerman. Foto: Katherine Du Tiel

Emden, Kunsthalle Kunsthalle Emden

Courtesy Villa Grisebach, Berlin

Museum Folkwang Essen / ARTOTHEK

Board of the Trustees of the University of Illinois on behalf of its Krannert Art Museum University of Illinois. Purchase through the Festival of Arts Purchase fund 1950-2-1

Collection Albright-Knox Art Gallery, Buffalo, New York. Room of Contemporary Art Fund, 1950 (RCA1950:1). Foto: Tom Loonan