1971
Benjamin B. Smith, 1971
Gemini G.E.L., 1972
Gemini G.E.L., 1973
Gemini G.E.L., 1987
Josef Albers, 1972
Gemini G.E.L., 1996
Gemini G.E.L., 1980
Gemini G.E.L., 1992
Gemini G.E.L., 1981
![WEG I from White Embossings on Gray [artist's proof]](https://api.nga.gov/iiif/4dc94055-c252-4edf-be4b-dc355e14c84e/full/843,/0/default.jpg)
![Zone [working proof]](https://api.nga.gov/iiif/1999af7d-aa2f-47f4-b196-48da915e2733/full/843,/0/default.jpg)
![Drypoint Lambda [special proof]](https://api.nga.gov/iiif/f2e1db6b-8d67-4964-8547-bdfdda54fe13/full/843,/0/default.jpg)