

Turquoise and Red Greys, Sequence Study
Bridget Riley English, born 1931

Nineteen Greys
Bridget Riley English, born 1931

Print for Chicago 8, from Conspiracy, The Artist as Witness
Bridget Riley (English, born 1931) printed at Kelpra Studio, Ltd., London

Colophon page, from Conspiracy, The Artist as Witness
Alexander Calder (American, 1898-1976); Larry Poons (American, born Japan, 1937); Jack Beal (American, born 1931); Romare Bearden (American, 1914-1988); Leon Golub (American, 1922-2004); Nancy Spero (American, 1926-2009); Robert Morris (American, 1931-2018); Peter Saul (American, born 1934); Raphael Soyer (American, born Russia, 1899-1988); Frank Stella (American, 1936-2024); Claes Oldenburg (American, born Sweden, 1929-2022); Bridget Riley (English, born 1931); and Sol Lewitt (American, 1928-2007) forward by Ramsey Clark (American, born 1927)