#18, 1964
Catalog #231
Estate of the Artist.
La Jolla, California, Jefferson Gallery, Karl Benjamin, January 31, 1964 – February 20, 1965.
West Hollywood, California, Louis Stern Fine Arts, Karl Benjamin and the Evolution of Abstraction, 1950-1980, September 24 – December 24, 2011.
London, United Kingdom, Flowers Gallery, 1960s California Hard-Edge: Karl Benjamin, Lorser Feitelson and Helen Lundeberg, July 5 – September 8, 2018.
“'Hard Edge Painter' Showing in La Jolla.” The Telescope, 9 February 1965.
Humbelt, Claudine. The New American Abstraction 1950-1970. Vol. 1, Milan: Skira, 2007, reproduced in color on page 493.
Karabenick, Julie. “An Interview With Artist Karl Benjamin.” Geoform (May 2008).
Muchnic, Suzanne, et al. Karl Benjamin and the Evolution of Abstraction, 1950-1980. West Hollywood: Louis Stern Fine Arts, 2011, plate 12, reproduced in color on page 47.