Antonio Souza Galeria, undated, 1956-1960 Select: Antonio Souza Galeria, undated, 1956-1960 Archivo Storio d'Arte Contemporania, 1960 Select: Archivo Storio d'Arte Contemporania, 1960 Art Gallery of Ontario, 1974 Select: Art Gallery of Ontario, 1974 Art Gallery of Toronto, 1955-1968 Select: Art Gallery of Toronto, 1955-1968 Art International , 1958-1966Select: Art International, 1958-1966 Arthur Jeffress Gallery, 1954 Select: Arthur Jeffress Gallery, 1954 The Arts Council of Great Britain, 1965 Select: The Arts Council of Great Britain, 1965 Badische Kunstverein, 1963 Select: Badische Kunstverein, 19632 Folders Bayerischen Staatsgemäldesammlungen, 1958 Select: Bayerischen Staatsgemäldesammlungen, 1958 Bezalel National Museum, 1963-1964 Select: Bezalel National Museum, 1963-1964 The British Arts Council, 1961-1966 Select: The British Arts Council, 1961-1966 Brussels Universal and International Exhibition, 1958 Select: Brussels Universal and International Exhibition, 1958 Casa Fontana, 1960 Select: Casa Fontana, 1960 Documenta II, 1959 Select: Documenta II, 1959 Ente Autonomo, La Biennale Di Venezia, 1960 Select: Ente Autonomo, La Biennale Di Venezia, 1960 Frankfurter Kunstkabinett, 1969-1970 Select: Frankfurter Kunstkabinett, 1969-1970 Galerie Anne Abels, 1960 Select: Galerie Anne Abels, 1960 Galerie Craven, 1961 Select: Galerie Craven, 1961 Galerie d'art Moderne, 1967-1968 Select: Galerie d'art Moderne, 1967-1968 Galerie d'eendt nv, 1967 Select: Galerie d'eendt nv, 1967 Galerie de France, 1953-1956 Select: Galerie de France, 1953-1956 Galerie Elfriede Wirnitzer, 1965 Select: Galerie Elfriede Wirnitzer, 1965 Galerie Gunther Franke, 1957-1976, undated Select: Galerie Gunther Franke, 1957-1976, undated7 Folders Galerie im Erker, 1970 Select: Galerie im Erker, 1970 Galerie Springer Berlin, undated, 1957-1969 Select: Galerie Springer Berlin, undated, 1957-1969 Galerie Thomas, 1971-1975 Select: Galerie Thomas, 1971-1975 Galerie Wilheim Grosshenning, 1960-1975 Select: Galerie Wilheim Grosshenning, 1960-19754 Folders Galleria D'Arte Del Naviglio, 1950 Select: Galleria D'Arte Del Naviglio, 1950 Galleria Delle Carozze, 1955 Select: Galleria Delle Carozze, 1955 Galleria Nazionale D'Arte Moderna, undated, 1960 Select: Galleria Nazionale D'Arte Moderna, undated, 1960 Gimpel Fils, 1955-1978 Select: Gimpel Fils, 1955-1978 Hamburger Kunsthalle, 1958-1968 Select: Hamburger Kunsthalle, 1958-1968 The Hanover Gallery, 1950-1953 Select: The Hanover Gallery, 1950-1953 Herbert Meyer Ellinger Gallery, 1971-1975 Select: Herbert Meyer Ellinger Gallery, 1971-1975 Institute of Contemporary Arts, undated Select: Institute of Contemporary Arts, undated International Biennial Exhibition of Prints in Tokyo, 1960 Select: International Biennial Exhibition of Prints in Tokyo, 1960 Klipstein and Kornfeld, 1960 Select: Klipstein and Kornfeld, 1960 Kunst und Museumvein Wuppertal, 1963-1964 Select: Kunst und Museumvein Wuppertal, 1963-1964 Kunsthalle Bremen, 1957 Select: Kunsthalle Bremen, 1957 Kunsthistorisches Institut, 1969 Select: Kunsthistorisches Institut, 1969 L'Obelisco Galeria d' Arte, 1954 Select: L'Obelisco Galeria d' Arte, 1954 La Loggia Galleria d'Arte, 1956-1957 Select: La Loggia Galleria d'Arte, 1956-1957 The Leicester Galleries, 1957-1958 Select: The Leicester Galleries, 1957-1958 Marlborough Fine Art Limited, 1974 Select: Marlborough Fine Art Limited, 1974 Max Beckmann Gesellschaft Archiv, undated, 1961-1969 Select: Max Beckmann Gesellschaft Archiv, undated, 1961-19694 Folders Montreal Museum of Art, 1960-1968 Select: Montreal Museum of Art, 1960-1968 Museu De Arte Moderna, Sao Paulo Biennial, 1953-1961 Select: Museu De Arte Moderna, Sao Paulo Biennial, 1953-19612 Folders National Galerie Berlin, 1966-1968 Select: National Galerie Berlin, 1966-19682 Folders National Gallery of Canada, 1968-1970 Select: National Gallery of Canada, 1968-1970 Niedersächsische Landesgalerie, 1964 Select: Niedersächsische Landesgalerie, 1964 P. Accademia Dei Virtuosi Al Pantheon, 1967-1973 Select: P. Accademia Dei Virtuosi Al Pantheon, 1967-1973 Roman Norbert Ketterer, 1957-1972 Select: Roman Norbert Ketterer, 1957-19723 Folders Societe Des Expositions, Du Palais Des Beaux-Arts, 1969-1970 Select: Societe Des Expositions, Du Palais Des Beaux-Arts, 1969-1970 Tate Gallery, 1970 Select: Tate Gallery, 1970 University of London, Courtauld Institute of Art, 1951, undated Select: University of London, Courtauld Institute of Art, 1951, undated Winnipeg Art Gallery, 1955 Select: Winnipeg Art Gallery, 1955