American
Untitled
WLS XIV from White Line Squares (Series II)
Train on Bridge from Vista Series
Stage Coach from Americana Suite
Creede II
Newstead Abbey
Blue White Red
Pagosa Springs
Two Flags [trial proof B]
Drypoint Zeta [special proof]
Two Flags [trial proof A]
Swiss Survey #2
Mirror
Blue Floor
Untitled [working proof]
Portrait of My Father [special proof]
Splines
Line Heat
Two Blacks and White
Blue/Black/Red/Green
Myriads, Only by Dark
, 1974
, 1975
![Two Flags [trial proof B]](https://api.nga.gov/iiif/764d5079-5607-4fad-9934-282edc1f9c14/full/843,/0/default.jpg)
![Drypoint Zeta [special proof]](https://api.nga.gov/iiif/51358fc0-5cb3-4175-96e9-1b6519a9fc0f/full/843,/0/default.jpg)
![Two Flags [trial proof A]](https://api.nga.gov/iiif/c5dcdd6b-0872-491e-823a-b0ffa3fcd0fe/full/843,/0/default.jpg)
![Untitled [working proof]](https://api.nga.gov/iiif/bb0e9873-8f79-40a1-86e5-a14dc11344e1/full/843,/0/default.jpg)
![Portrait of My Father [special proof]](https://api.nga.gov/iiif/381b1db3-3806-47ef-981b-5c3053c648dc/full/843,/0/default.jpg)
![York Factory II [color trial proof]](https://api.nga.gov/iiif/7af31cd9-a552-462c-864e-de436c4297e1/full/843,/0/default.jpg)
![York Factory II [color trial proof III]](https://api.nga.gov/iiif/fca89177-71d6-4f66-8fd4-3094ee7b2014/full/843,/0/default.jpg)
![Ale Cans [trial proof]](https://api.nga.gov/iiif/5bfe2759-4363-4eb3-9489-c3bb7b0f536d/full/843,/0/default.jpg)
![Ale Cans [trial proof C]](https://api.nga.gov/iiif/40a991d7-36e8-405f-a90e-59ad2bdbfde7/full/843,/0/default.jpg)
![Ale Cans [trial proof A]](https://api.nga.gov/iiif/29cf464a-4b21-46fc-a6ab-d08362bfb8b4/full/843,/0/default.jpg)
![Ale Cans [trial proof F]](https://api.nga.gov/iiif/3b97b86f-b9e9-4445-b2da-45f64bfb3aad/full/843,/0/default.jpg)
![Ale Cans [working proof]](https://api.nga.gov/iiif/7c603005-8a8d-4580-9ccc-f19c222e38e0/full/843,/0/default.jpg)