1960–1970
National Gallery of Art, 1936
National Gallery of Art, 1969
National Gallery of Art, 1515
National Gallery of Art, 1940
American 20th Century, 1962
National Gallery of Art, 1864
National Gallery of Art, 1896
National Gallery of Art, 1935
National Gallery of Art, 1869
National Gallery of Art, 1786
National Gallery of Art, 1887
National Gallery of Art, 1624
![Untitled, Second State (Ruler and Fork) [trial proof]](https://api.nga.gov/iiif/4db704ba-4974-4805-9f13-fbb6ab800e09/full/843,/0/default.jpg)
