1987–1989
Gemini G.E.L., 1969
Gemini G.E.L., 1972
Ellsworth Kelly, 1974
Ellsworth Kelly, 1987
Gemini G.E.L., 1973
Gemini G.E.L., 1986
Gemini G.E.L., 1981
James Pollard, 1993
Gemini G.E.L., 1976
Gemini G.E.L., 1966
![Figure 6 [working proof]](https://api.nga.gov/iiif/379aed58-8467-4ec5-b77a-6bca2ca431bc/full/843,/0/default.jpg)
![Four Panels from Untitled 1972 [D Panel, trial proof 5]](https://api.nga.gov/iiif/becb7e98-5af2-462f-ac2f-2a71f387dd96/full/843,/0/default.jpg)
![#6 (after 'Untitled 1975') [progressive proof 12]](https://api.nga.gov/iiif/8b92f0be-db4c-4d7f-8224-d6a41153010d/full/843,/0/default.jpg)
