1938–1941
National Gallery of Art, 1915
National Gallery of Art, 1620
National Gallery of Art, 1820
National Gallery of Art, 1964
National Gallery of Art, 1924
National Gallery of Art, 1600
National Gallery of Art, 1942
National Gallery of Art, 1965
National Gallery of Art, 1937
National Gallery of Art, 1615
National Gallery of Art, 1884
![Ida and Georgia O'Keeffe [recto]](https://api.nga.gov/iiif/54392d1c-7e7e-46e8-961f-1137058de9f3/full/843,/0/default.jpg)
![Zwei Köpfe (Two Heads) [p. 39]](https://api.nga.gov/iiif/8510cd23-d3a6-459b-9c87-63d27414e87e/full/843,/0/default.jpg)