1975
Gemini G.E.L., 1972
Gemini G.E.L., 1981
Gemini G.E.L., 1976
Gemini G.E.L., 1968
Gemini G.E.L., 1994
Charles Ritt, 1968
Gemini G.E.L., 1973
Charles Ritt, 1967
Gemini G.E.L., 1971
Gemini G.E.L., 1982
Gemini G.E.L., 1980
![Figure 4 [trial proof]](https://api.nga.gov/iiif/bf14db92-7716-423b-ab3c-a9ac182c912e/full/843,/0/default.jpg)
![Four Panels from Untitled 1972 [C panel, trial proof 8]](https://api.nga.gov/iiif/05d60e31-416e-4254-9214-5cd207d11dde/full/843,/0/default.jpg)
![Delaware Crossing [color trial proof]](https://api.nga.gov/iiif/e9a5612d-0efc-4b70-9b81-e99b1d2f5371/full/843,/0/default.jpg)
