1980–1981
Gemini G.E.L., 1999
Gemini G.E.L., 1969
Gemini G.E.L., 1966
Gemini G.E.L., 1988
Gemini G.E.L., 1971
Gemini G.E.L., 1972
Gemini G.E.L., 1993
Gemini G.E.L., 1986
![Drypoint Zeta [special proof]](https://api.nga.gov/iiif/51358fc0-5cb3-4175-96e9-1b6519a9fc0f/full/843,/0/default.jpg)
![Figure 9 [color trial proof]](https://api.nga.gov/iiif/a6d86825-54ba-4a1a-921a-a56ed4b8b8f0/full/843,/0/default.jpg)
![Hinged Canvas [working proof]](https://api.nga.gov/iiif/5b33088c-1b2c-4997-8976-108b97ca48e8/full/843,/0/default.jpg)
![Gorge d'Incre [special proof]](https://api.nga.gov/iiif/aa493d6e-7679-407b-bfec-d6001444aeef/full/843,/0/default.jpg)
