1981–1982
Gemini G.E.L., 1967
Gemini G.E.L., 1973
Ellsworth Kelly, 1971
Gemini G.E.L., 1968
Gemini G.E.L., 1972
Gemini G.E.L., 1983
Gemini G.E.L., 1975
Gemini G.E.L., 1971
Gemini G.E.L., 1986
Gemini G.E.L., 1977
![Four Panels from Untitled 1972 [D panel, trial proof 9]](https://api.nga.gov/iiif/0bd96582-633e-4ca7-9500-fe28aa733643/full/843,/0/default.jpg)
![Untitled [trial proof 1]](https://api.nga.gov/iiif/69c17593-d8b0-4c5a-a012-6a701038cfc8/full/843,/0/default.jpg)