1972
Gemini G.E.L., 1989
Gemini G.E.L., 1973
Gemini G.E.L., 1969
Gemini G.E.L., 1976
Gemini G.E.L., 1987
Gemini G.E.L., 1970
Gemini G.E.L., 1971
Gemini G.E.L., 1999
Gemini G.E.L., 2001
Gemini G.E.L., 1967
![Four Panels from Untitled 1972 [A panel, trial proof 2]](https://api.nga.gov/iiif/fc49bfd9-5f8b-48cc-9230-2e7c88c9a7b0/full/843,/0/default.jpg)
![#6 (after 'Untitled 1975') [progressive proof 12]](https://api.nga.gov/iiif/8b92f0be-db4c-4d7f-8224-d6a41153010d/full/843,/0/default.jpg)
![Figure 5 [working proof]](https://api.nga.gov/iiif/5eef711e-3d48-43c2-ab15-63e2da6c54c4/full/843,/0/default.jpg)
