signed and dated 1968 on the reverse
oil on paper
21 5/8 by 22 in. 54.9 by 55.9 cm.
Lawrence Markey, Inc., New York
Acquired from the above by the present owner in April 2010
Art Institute of Chicago, The Judith Neisser Collection: Minimal and Postminimal Innovation, February - May 2011, p. 30, illustrated in color