1920–1999
National Gallery of Art, 1847
National Gallery of Art, 1941
National Gallery of Art, 1958
National Gallery of Art, 1603
National Gallery of Art, 1922
National Gallery of Art, 2019
American 20th Century, 1940
National Gallery of Art, 1621
American 20th Century, 1963
National Gallery of Art, 1681
National Gallery of Art, 1983
National Gallery of Art, 1937
![Canyon Clouds [working proof 1]](https://api.nga.gov/iiif/eb3d1091-c208-438e-88d2-19a02b3fec84/full/843,/0/default.jpg)
![Studies for Constructivist Sculptures [verso]](https://api.nga.gov/iiif/b286b6a7-fa6f-4082-a8e0-448d56ce5d31/full/843,/0/default.jpg)