1969–1970
Gemini G.E.L., 1980
Gemini G.E.L., 1969
Gemini G.E.L., 1979
Benjamin B. Smith, 1967
Gemini G.E.L., 1981
Gemini G.E.L., 1966
Gemini G.E.L., 1989
Ken Price, 1986
Benjamin B. Smith, 1975
Gemini G.E.L., 1967
Benjamin B. Smith, 1969
![Drypoint Delta [special proof]](https://api.nga.gov/iiif/6467a0f7-a7ae-40fc-98b2-b27ea13e71b0/full/843,/0/default.jpg)
![Figure 4 [working proof]](https://api.nga.gov/iiif/23b79df4-7c44-4763-8578-eb4b2130ae70/full/843,/0/default.jpg)
![Car [special proof]](https://api.nga.gov/iiif/5763f76b-2cfd-424c-b4c4-b883d1ac140a/full/843,/0/default.jpg)
![Cicada [trial proof]](https://api.nga.gov/iiif/9c29e63f-dfad-421c-bd9a-ea97914cc53b/full/843,/0/default.jpg)
![Pile Up [special proof]](https://api.nga.gov/iiif/1509edf0-7d07-422b-865c-6f35b895c0fa/full/843,/0/default.jpg)