1980–1981
Gemini G.E.L., 1986
Gemini G.E.L., 1999
Gemini G.E.L., 1974
Gemini G.E.L., 1976
Gemini G.E.L., 1978
Gemini G.E.L., 1967
Gemini G.E.L., 1975
Gemini G.E.L., 1972
![Drypoint Iota [special proof]](https://api.nga.gov/iiif/9b263b97-cc79-4100-b2a1-3b520bdb0db2/full/843,/0/default.jpg)
![School (State) [special proof]](https://api.nga.gov/iiif/562d5e3a-ac65-4807-be64-3ee11d9f1f80/full/843,/0/default.jpg)
![#4 (after 'Untitled 1975') [trial proof]](https://api.nga.gov/iiif/e412dbd6-a61c-422c-9421-70cf2c494fdb/full/843,/0/default.jpg)
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