1983
National Gallery of Art, 1825
National Gallery of Art, 1938
National Gallery of Art, 1935
National Gallery of Art, 1783
National Gallery of Art, 1627
National Gallery of Art, 1978
National Gallery of Art, 1917
National Gallery of Art, 1994
National Gallery of Art, 1970
National Gallery of Art, 1480
National Gallery of Art, 1971
National Gallery of Art, 1895
![Green Angel 2 Experimental Lithos [trial proof]](https://api.nga.gov/iiif/a8545d86-a74b-4d2b-9538-03049ac5abef/full/843,/0/default.jpg)
![Painting with Two Balls (Grays) [trial proof]](https://api.nga.gov/iiif/7ab52c2a-0d53-4689-9fda-e495fc518367/full/843,/0/default.jpg)
