1972
National Gallery of Art, 1914
National Gallery of Art, 1864
National Gallery of Art, 1922
National Gallery of Art, 1828
National Gallery of Art, 1939
National Gallery of Art, 1935
National Gallery of Art, 1975
National Gallery of Art, 1937
National Gallery of Art, 1692
National Gallery of Art, 1647
Patrons' Permanent Fund, 1969
![Zone [trial proof 6]](https://api.nga.gov/iiif/39ebf91c-690c-4ad3-825f-2dc12d0f6dd2/full/843,/0/default.jpg)
![Untitled (Ruler) [trial proof]](https://api.nga.gov/iiif/d5c3a268-ebb5-4d3b-85ae-60ad4466e3ba/full/843,/0/default.jpg)