lower left on face of one segment, in script: Di S; B//:(Gemini chop) GEMINI II
- Best Impressions: 35 Years of Prints and Sculpture from Gemini G.E.L., National Gallery of Art, Washington, 2001-2002, as.
- GEM 775.
- Sculpture: An Illustrated Catalogue. National Gallery of Art, Washington, 1994: 78, repro.