1969–1970
Gemini G.E.L., 1986
Roy Lichtenstein, 1991
Gemini G.E.L., 1978
Roy Lichtenstein, 1984
Gemini G.E.L., 1974
Gemini G.E.L., 1976
Gemini G.E.L., 1980
Roy Lichtenstein, 2001
Gemini G.E.L., 1967
Roy Lichtenstein, 1963
Roy Lichtenstein, 1976
![Two Flags [trial proof A]](https://api.nga.gov/iiif/c5dcdd6b-0872-491e-823a-b0ffa3fcd0fe/full/843,/0/default.jpg)
