across bottom below plate mark: OKTP 9 Stones 2 John Cage '89
Acquired by NGA 1996 directly from Kathan Brown.
- Yes, No, Maybe: Artists Working at Crown Point Press, National Gallery of Art, Washington, D.C., 1 Sep 2013 - 5 Jan 2014.
- Brodie, Judith, and Adam Greenhalgh. Yes, No, Maybe: Artists Working at Crown Point Press. Washington, DC: National Gallery of Art, 2013, p. 93, pl. 16.4.