1966
Josef Albers, 1963
Josef Albers, 1972
Benjamin B. Smith, 1971
Gemini G.E.L., 1970
Gemini G.E.L., 1992
Gemini G.E.L., 1975
Josef Albers, 1965
Gemini G.E.L., 1971
Gemini G.E.L., 1969
Josef Albers, 1964
![Untitled [trial proof]](https://api.nga.gov/iiif/0b22cf9c-f888-4979-9a58-d5286966643b/full/843,/0/default.jpg)
![Figure 8 [trial proof]](https://api.nga.gov/iiif/fb80fd10-f303-4898-a20a-93b9da5683ec/full/843,/0/default.jpg)
![Figure 0 [working proof]](https://api.nga.gov/iiif/e70300d7-3e17-422a-94f5-447e90fb23bb/full/843,/0/default.jpg)
