1969
Robert Rauschenberg, 1999
Ron McPherson, 1987
Gemini G.E.L., 1999
Gemini G.E.L., 2004
Gemini G.E.L., 1968
Kenneth Tyler, 1968
Ron Adams, 1970
Gemini G.E.L., 1967
Gemini G.E.L., 1993
Robert Rauschenberg, 1964
Robert Rauschenberg, 1969
![Gray Alphabets [working proof]](https://api.nga.gov/iiif/c7d881b5-8fca-4146-b30c-5820b30cbccc/full/843,/0/default.jpg)
![Slow Rise [special proof]](https://api.nga.gov/iiif/bc4abe09-fed2-465f-aa83-bdf59640bae3/full/843,/0/default.jpg)
