lower right verso in graphite: O.K / C.B; upper left verso in graphite: 2
- Thirty-five Years at Crown Point Press, National Gallery of Art, Washington, 1997, no. 131*, as Gymnasium Chases: Untitled.
- Thirty-five Years at Crown Point Press. Exh. cat. National Gallery of Art, Washington; The Fine Arts Museums of San Francisco, 1997-1998: no. 131*.