1966
James Webb, 1969
Gemini G.E.L., 1972
Gemini G.E.L., 1983
Gemini G.E.L., 1967
Gemini G.E.L., 1974
Gemini G.E.L., 1971
Gemini G.E.L., 1990
Gemini G.E.L., 1969
Gemini G.E.L., 1966
Gemini G.E.L., 2003
![Figure 0 [trial proof]](https://api.nga.gov/iiif/616a843c-a4ec-4adc-971e-58eea57bdc38/full/843,/0/default.jpg)
![Zone [trial proof]](https://api.nga.gov/iiif/ac089abd-a62b-4356-971b-e8cff96a8112/full/843,/0/default.jpg)
![Bent "Blue" [working proof]](https://api.nga.gov/iiif/25190e59-6ffb-4652-ab02-8434c9babb59/full/843,/0/default.jpg)
![WLS VIII from White Line Squares (Series I) [artist's proof]](https://api.nga.gov/iiif/3fe6f7ec-b458-4bd6-858c-9bd399b9365c/full/843,/0/default.jpg)
![Figure 9 [color trial proof]](https://api.nga.gov/iiif/a6d86825-54ba-4a1a-921a-a56ed4b8b8f0/full/843,/0/default.jpg)
