American
Hybrid
Sub-Total
Peace Through Chemistry I
Red-Orange Yellow Blue
Grid Stack
Green Black
Blue White Red
, 1971
, 1972
![Untitled [working proof]](https://api.nga.gov/iiif/e74ddd17-dc42-4043-b220-7e1ef87f77d9/full/843,/0/default.jpg)
![Bent "Blue" [working proof]](https://api.nga.gov/iiif/25190e59-6ffb-4652-ab02-8434c9babb59/full/843,/0/default.jpg)
![Untitled [working proof]](https://api.nga.gov/iiif/d8c203e1-2984-46a5-a5e4-73aaae704297/full/843,/0/default.jpg)
![Untitled [working proof]](https://api.nga.gov/iiif/d7c2f1d5-d788-4d36-81b8-d95e47efd6bd/full/843,/0/default.jpg)
![Untitled [working proof]](https://api.nga.gov/iiif/65ca8ac9-428e-4ed4-8a3b-01a08e22808d/full/843,/0/default.jpg)
![Delaware Crossing [color trial proof]](https://api.nga.gov/iiif/6b380faa-3752-4b9a-b576-7e8a277615fc/full/843,/0/default.jpg)
![Evian [trial proof]](https://api.nga.gov/iiif/3eef463a-b163-4dd5-a7c1-8264f081fdf2/full/843,/0/default.jpg)
![Good Time Charley [working proof]](https://api.nga.gov/iiif/6f452f79-dbde-4d18-b0db-b7dcbe6e0d88/full/843,/0/default.jpg)
