1970–1971
Jeff Wasserman, 1975
Gemini G.E.L., 1986
Roy Lichtenstein, 1951
Roy Lichtenstein, 1963
Gemini G.E.L., 1967
Gemini G.E.L., 1989
Gemini G.E.L., 1978
Jeff Wasserman, 1971
Gemini G.E.L., 1973
Gemini G.E.L., 1968
![Feet [proof]](https://api.nga.gov/iiif/882109e8-0d3b-4fb3-8fcf-e1374e4df7d9/full/843,/0/default.jpg)
![Figure 8 [trial proof 1]](https://api.nga.gov/iiif/b8b57cc4-855c-4328-9372-a9544001019a/full/843,/0/default.jpg)
![Knee [proof]](https://api.nga.gov/iiif/73e52519-98c2-4b64-855b-2e88dd4b75b9/full/843,/0/default.jpg)