1966–1968
Gemini G.E.L., 1992
Gemini G.E.L., 1979
Benjamin B. Smith, 1970
Gemini G.E.L., 1981
Benjamin B. Smith, 1975
Gemini G.E.L., 1973
Gemini G.E.L., 1969
Gemini G.E.L., 1983
Gemini G.E.L., 1970
Gemini G.E.L., 1976
Kenneth Tyler, 1972
![Untitled [trial proof]](https://api.nga.gov/iiif/dd4511ed-b557-4095-9369-b03c03e97033/full/843,/0/default.jpg)
![Four Panels from Untitled 1972 [D panel, trial proof 12]](https://api.nga.gov/iiif/1a184783-2ff6-4408-af96-4f3147195f5c/full/843,/0/default.jpg)
![Easel [special proof]](https://api.nga.gov/iiif/e816a30f-9262-47db-b41d-5a4e2fe441ea/full/843,/0/default.jpg)
![Figure 0 [trial proof]](https://api.nga.gov/iiif/11f4ac03-4b4c-4ce1-90d1-2a49e63e1fe3/full/843,/0/default.jpg)
![#6 (after 'Untitled 1975') [progressive proof 3]](https://api.nga.gov/iiif/1eb1db68-7433-4124-8a79-76a9d32078e1/full/843,/0/default.jpg)
