lower right in graphite: SW Hayter 18 Jan 47.; lower center in graphite: Unstable Woman; lower left in graphite: E 1/5
Jacob and Ruth Cole Kainen, Chevy Chase, Maryland; acquired 1994 by the National Gallery of Art
- Recent Acquisitions of Works of Art on Paper, National Gallery of Art, Washington, 1995.
- Black, Peter, and Désirée Moorhead. The Prints of Stanley William Hayter: A Complete Catalogue. Mount Kisco, New York: Moyer Bell Limited, 1992, no. 177.