1966–1968
Gemini G.E.L., 1979
Gemini G.E.L., 1969
William Crutchfield, 1970
Gemini G.E.L., 1977
Benjamin B. Smith, 1966
Gemini G.E.L., 2008
Gemini G.E.L., 1980
Gemini G.E.L., 1968
Gemini G.E.L., 1976
Gemini G.E.L., 1978
Gemini G.E.L., 1982
Gemini G.E.L., 1975
![Figure 1 [color trial proof]](https://api.nga.gov/iiif/3d8bad5d-e790-453d-81ec-5b37faaa4e5e/full/843,/0/default.jpg)
