1987–1988
Gemini G.E.L., 1968
Gemini G.E.L., 1966
Gemini G.E.L., 1980
Gemini G.E.L., 1981
Gemini G.E.L., 1969
Gemini G.E.L., 1971
Gemini G.E.L., 1973
Gemini G.E.L., 1975
Gemini G.E.L., 1977
Ellsworth Kelly, 1976
![Figure 2 [trial proof]](https://api.nga.gov/iiif/321ad7f7-e17e-48f9-899c-84a51e197388/full/843,/0/default.jpg)
![Two Flags [trial proof A]](https://api.nga.gov/iiif/c5dcdd6b-0872-491e-823a-b0ffa3fcd0fe/full/843,/0/default.jpg)
![Figure 0 [progressive proof 3]](https://api.nga.gov/iiif/7e98b5a1-878a-44d4-8afe-7c43fa869096/full/843,/0/default.jpg)
![Ale Cans [trial proof]](https://api.nga.gov/iiif/78a6aeb8-2514-4c75-ba7a-2a661c9e0186/full/843,/0/default.jpg)
