1970–1971
Gemini G.E.L., 1976
Gemini G.E.L., 1967
Ron Adams, 1970
Gemini G.E.L., 1983
Gemini G.E.L., 1969
Gemini G.E.L., 1974
Gemini G.E.L., 1968
Gemini G.E.L., 1980
Gemini G.E.L., 1979
Gemini G.E.L., 1973
![#6 (after 'Untitled 1975') [progressive proof 10]](https://api.nga.gov/iiif/0c54492d-0e03-4445-a553-2b5cc5fd3c00/full/843,/0/default.jpg)
![Figure 8 [trial proof 3]](https://api.nga.gov/iiif/529730ec-65c0-47b6-9490-ebe6bab38d82/full/843,/0/default.jpg)
![York Factory II [color trial proof III]](https://api.nga.gov/iiif/fca89177-71d6-4f66-8fd4-3094ee7b2014/full/843,/0/default.jpg)
![Celia Pondering [special proof]](https://api.nga.gov/iiif/f22d6731-1a24-4f09-b9e0-f147ce3f9661/full/843,/0/default.jpg)
![Four Panels from Untitled 1972 [D panel, trial proof 1]](https://api.nga.gov/iiif/f869238d-9300-40a0-bea0-496f7417ef8b/full/843,/0/default.jpg)
![Four Panels from Untitled 1972 [B panel trial proof 1]](https://api.nga.gov/iiif/96e53c7e-6bbd-4e32-b971-596176ddf6ee/full/843,/0/default.jpg)