1976–1977
Edward Henderson, 1977
Gemini G.E.L., 1976
Gemini G.E.L., 1973
Gemini G.E.L., 1994
Gemini G.E.L., 2004
Gemini G.E.L., 1981
Mark Stock, 1977
Gemini G.E.L., 1972
Gemini G.E.L., 1992
Gemini G.E.L., 1969
![Bookplate for David Grainger Whitney [trial proof]](https://api.nga.gov/iiif/e3d32384-aadd-4234-b744-718755d71228/full/843,/0/default.jpg)
![Four Panels from Untitled 1972 [D panel, trial proof 22]](https://api.nga.gov/iiif/df57963a-61bd-4201-a557-e98a477a446d/full/843,/0/default.jpg)
![#6 (after 'Untitled 1975') [progressive proof 10]](https://api.nga.gov/iiif/0c54492d-0e03-4445-a553-2b5cc5fd3c00/full/843,/0/default.jpg)
![0 through 9 [trial proof]](https://api.nga.gov/iiif/69b8c30a-b882-49f6-9da2-99a775f05f06/full/843,/0/default.jpg)
