Bridget Riley, Untitled [Nineteen Greys D], 1968.
Courtesy of the artist
28. Untitled [Nineteen Greys D]
| Artist | Bridget Riley |
| Year | 1968 |
| Medium | Screen print in 19 colors on Saunders board |
| Dimensions | 30 x 30 in. (76.2 x 76.2 cm) |
| Collection | Courtesy of the artist |