1928
National Gallery of Art, 1976
National Gallery of Art, 1973
National Gallery of Art, 1600
National Gallery of Art, 1993
National Gallery of Art, 1969
National Gallery of Art, 1657
National Gallery of Art, 1945
National Gallery of Art, 1983
National Gallery of Art, 1884
National Gallery of Art, 1936
National Gallery of Art, 1938
![Flagstones (a) [trial proof 6]](https://api.nga.gov/iiif/ecbc1a24-d47c-425a-9d98-5faa45187141/full/843,/0/default.jpg)
![Station [working proof 24]](https://api.nga.gov/iiif/8e3b74f6-bc23-4542-a2fd-dbbc88e6e7ce/full/843,/0/default.jpg)
![Zwei Figuren (Two Figures [p. 51]](https://api.nga.gov/iiif/4c3d595c-41c9-4c00-8d6e-70f9a444f48a/full/843,/0/default.jpg)
