1981–1982
Gemini G.E.L., 1981
Gemini G.E.L., 1977
Gemini G.E.L., 1966
Peter Carlson, 1978
Gemini G.E.L., 1971
Gemini G.E.L., 1968
Gemini G.E.L., 1976
![Cicada [trial proof]](https://api.nga.gov/iiif/61b6d4fa-9cc2-4ea9-b3c2-17facb6fdfcb/full/843,/0/default.jpg)
![0 through 9 [trial proof]](https://api.nga.gov/iiif/b8975dc4-b08f-4234-971c-f312f66c9c0d/full/843,/0/default.jpg)
![0 through 9 [trial proof]](https://api.nga.gov/iiif/c97f03b9-02c1-4e99-a78a-7e275656c3ed/full/843,/0/default.jpg)
![Cicada [trial proof]](https://api.nga.gov/iiif/2731455c-105b-4f8e-b28c-c90bd07e1f83/full/843,/0/default.jpg)
![Figure 8 [trial proof 2]](https://api.nga.gov/iiif/76aa8056-2a81-4f8a-a52c-61ebea9e56c0/full/843,/0/default.jpg)
![Delaware Crossing [color trial proof]](https://api.nga.gov/iiif/2ff91d54-7f72-4d2a-a26a-cf3b4aa79feb/full/843,/0/default.jpg)
![Maurice and the Flowers [trial proof 2]](https://api.nga.gov/iiif/7c4eda35-2409-4cf0-ab43-d7616acc00c7/full/843,/0/default.jpg)