lower left in graphite: "Mach 5"; lower center in graphite: 10/25; lower right in graphite: Warrington Colescott 1957
Lessing J. Rosenwald, Alverthorpe, PA; acquired 1959 by the National Gallery of Art
- Chapin, Mary Weaver. The Prints of Warrington Colescott: A Catalogue Raisonné, 1948-2008. Madison: University of Wisconsin Press, 2010, p. 94, no. 43.