1970
Gemini G.E.L., 1968
Gemini G.E.L., 1966
Gemini G.E.L., 1987
Gemini G.E.L., 1992
Gemini G.E.L., 1991
Gemini G.E.L., 1996
Gemini G.E.L., 1974
Gemini G.E.L., 1971
Frank Stella, 1997
Gemini G.E.L., 1984
![Figure 4 [trial proof]](https://api.nga.gov/iiif/bf14db92-7716-423b-ab3c-a9ac182c912e/full/843,/0/default.jpg)
![Delaware Crossing [color trial proof]](https://api.nga.gov/iiif/671ce331-d8cb-47c1-a606-594828a245d4/full/843,/0/default.jpg)
![Drypoint—Ocean Surface (Second State) [special proof]](https://api.nga.gov/iiif/8fea30fb-bcf6-4eda-be7d-161bf7a2a2fd/full/843,/0/default.jpg)