1992–1993
Gemini G.E.L., 1971
Gemini G.E.L., 1969
Gemini G.E.L., 1986
Gemini G.E.L., 1981
Ellsworth Kelly, 1978
Gemini G.E.L., 1983
Ellsworth Kelly, 2001
Gemini G.E.L., 1976
James Pollard, 1994
![Cicada [trial proof]](https://api.nga.gov/iiif/045614ff-97c7-41bf-b404-658830867029/full/843,/0/default.jpg)
![Delaware Crossing [color trial proof]](https://api.nga.gov/iiif/6b380faa-3752-4b9a-b576-7e8a277615fc/full/843,/0/default.jpg)
![#6 (after 'Untitled 1975') [progressive proof 7]](https://api.nga.gov/iiif/56d1a753-cb67-48a9-8d12-cc33873c0a96/full/843,/0/default.jpg)
![Untitled [working proof]](https://api.nga.gov/iiif/1acceaab-41c1-4aea-a615-a2d129f6b6cd/full/843,/0/default.jpg)
