1968
Gemini G.E.L., 1980
Robert Rauschenberg, 1997
Gemini G.E.L., 1975
Dan Gualdoni, 1968
Gemini G.E.L., 1981
Gemini G.E.L., 1973
Woodward Foundation, 1965
Robert Rauschenberg, 1983
Robert Rauschenberg, 1964
Robert Rauschenberg, 1973
Gemini G.E.L., 1979
![Drypoint Iota [special proof]](https://api.nga.gov/iiif/9b263b97-cc79-4100-b2a1-3b520bdb0db2/full/843,/0/default.jpg)
![Ale Cans [trial proof]](https://api.nga.gov/iiif/5bfe2759-4363-4eb3-9489-c3bb7b0f536d/full/843,/0/default.jpg)
![Cicada [trial proof]](https://api.nga.gov/iiif/388bf80f-f371-41e2-aafa-df0f8981b9f9/full/843,/0/default.jpg)
![Elements [special proof]](https://api.nga.gov/iiif/cd162326-c0eb-411b-b946-7a574e58572c/full/843,/0/default.jpg)