Albright-Knox Art Gallery, Buffalo, N.Y.
Art Institute of Chicago, Chicago, ill.
Arts Council of Great Britain, London, England
Australian National Gallery, Canberra, Australia
Baltimore Museum of Art, Baltimore, Md.
Blanton Museum of Art, U of Texas at Austin, Austin
Barbara Thumm, Berlin, Germany
Brooklyn Museum, Brooklyn, NY.
Centre Pompidou, Paris, France
Chase Manhattan Bank, NYC, NY.
Fort Worth Museum, Fort Worth, Texas
Gemeentemuseum Arnhem, Arnhem, NL.
Glenstone Museum Foundation, Wash. DC
Haags Gemeentemuseum, Den Haag, NL.
Kaiser Wilhelm Museum, Krefeld, West-Germany
Kunstmuseum Liechtenstein, Vaduz
Kunstmusem Winterthur, Winterthur, Switzerland.
LA. County Museum, LA Calif
Levi-Strauss Coll., San Francisco, Calif.
Ludwig Coll., Kölnischer Kunstverein, Köln, West Germany
Ludwig Coll., Suermondt Museum, Aachen, West Germany
Museum für Moderne Kunst, Frankfurt am Main
Museumm moderner Kunst, Ludwig Stiftung, Vienna
Museum of Contemporary Art, L.A.
Museum of Modern Art, NYC, NY.
National Gallery of Art, Washington, D.C.
Neuberger Museum, State University of New York at Purchase, N.Y.
Norton Simon Museum, Pasadena, Calif.
Pace Gallery, NYC, NY.
Reina Sofia, Madrid, Spain
Rijksdienst Beeldende Kunst, The Hague, NL.
Rijksmuseum Kröller-Müller, Otterlo, NL.
Riklis Collection, Louisiana Museum of Modern Art, Copenhagen, Denmark
Saatchi Coll., London, England
San Francisco MOMA, S.F. Calif.
Solomon R. Guggenheim Museum, NYC, NY.
Stedelijk Museum, Amsterdam, NL.
Stedelijk Van Abbemuseum, Eindhoven, NL.
Tate Gallery, London, England
Washington U of St. Louis, St. Louis Missouri
Weatherspoon Museum, U of NC, Greensboro, North Carolina
Whitney Museum of American Art, NYC, NY.
Yale University Art Gallery, New Haven, Conn.