1999
Gemini G.E.L., 1969
Gemini G.E.L., 1994
Gemini G.E.L., 1972
Gemini G.E.L., 1980
Gemini G.E.L., 1968
Gemini G.E.L., 2004
Gemini G.E.L., 1991
Gemini G.E.L., 1973
Gemini G.E.L., 1993
![Figure 6 [color trial proof]](https://api.nga.gov/iiif/57ec32d2-ee51-4dd0-b369-ee69e962bee7/full/843,/0/default.jpg)
!["M" [trial proof]](https://api.nga.gov/iiif/1169d401-2123-4f5c-9d17-60aa3b570e1c/full/843,/0/default.jpg)
![Drypoint Lambda [special proof]](https://api.nga.gov/iiif/f2e1db6b-8d67-4964-8547-bdfdda54fe13/full/843,/0/default.jpg)
![Four Panels from Untitled 1972 [D panel, trial proof 12]](https://api.nga.gov/iiif/1a184783-2ff6-4408-af96-4f3147195f5c/full/843,/0/default.jpg)
