in graphite lower right: VA 79-81 OKTP
Acquired by NGA from Kathan Brown 1997.
- Thirty-five Years at Crown Point Press, National Gallery of Art, Washington, 1997, no. 69*, as 3 Flags for 1 Space and 6 Regions.
- Thirty-five Years at Crown Point Press. Exh. cat. National Gallery of Art, Washington; The Fine Arts Museums of San Francisco, 1997-1998: no. 69*.