1978
Gemini G.E.L., 1969
Gemini G.E.L., 1971
Gemini G.E.L., 2008
Gemini G.E.L., 1977
Gemini G.E.L., 1981
Gemini G.E.L., 1970
Ellsworth Kelly, 1999
Ellsworth Kelly, 1976
Gemini G.E.L., 1974
Ellsworth Kelly, 1992
Gemini G.E.L., 1976
![Figure 5 [working proof]](https://api.nga.gov/iiif/5eef711e-3d48-43c2-ab15-63e2da6c54c4/full/843,/0/default.jpg)
![Delaware Crossing [color trial proof]](https://api.nga.gov/iiif/0fc75009-e3a8-42bd-8f95-8abb502b1043/full/843,/0/default.jpg)
![Human Structures and the Light of Consciousness for Obama [special proof]](https://api.nga.gov/iiif/ca53eb23-29bf-4c04-a877-e290a9ae3b9d/full/843,/0/default.jpg)
