1968
Robert de la Rocha, 1967
Gemini G.E.L., 1982
Gemini G.E.L., 1968
Gemini G.E.L., 1969
Gemini G.E.L., 1976
Gemini G.E.L., 1973
Gemini G.E.L., 1978
Gemini G.E.L., 1986
Gemini G.E.L., 1974
Gemini G.E.L., 1967
Gemini G.E.L., 1980
![#6 (after 'Untitled 1975') [progressive proof 15]](https://api.nga.gov/iiif/55152616-bdc8-4db4-94d1-fffd9fee52f0/full/843,/0/default.jpg)
![Four Panels from Untitled 1972 [D panel, trial proof 21]](https://api.nga.gov/iiif/88639f9d-c76f-40ef-9bfe-e0e9a85d758e/full/843,/0/default.jpg)
![Figure 1 [trial proof]](https://api.nga.gov/iiif/d19b56d3-b9eb-4103-895a-fb7a7cd59326/full/843,/0/default.jpg)
