1980–1981
Gemini G.E.L., 1976
Gemini G.E.L., 1980
Gemini G.E.L., 1968
Gemini G.E.L., 2003
Gemini G.E.L., 1969
Gemini G.E.L., 1977
Gemini G.E.L., 1978
Gemini G.E.L., 1987
![Drypoint Theta [special proof]](https://api.nga.gov/iiif/86d9b732-bd19-4790-b277-3298550bbd77/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)
![Drypoint Nu [special proof]](https://api.nga.gov/iiif/fb508dd7-d411-4a80-ab24-628d8df5bab6/full/843,/0/default.jpg)
![Gray Alphabets [working proof]](https://api.nga.gov/iiif/c7d881b5-8fca-4146-b30c-5820b30cbccc/full/843,/0/default.jpg)
![Alphabet [trial proof 2]](https://api.nga.gov/iiif/8b86d47c-dd73-4cc3-8b52-02d368a7462b/full/843,/0/default.jpg)
