1948
National Gallery of Art, 1964
National Gallery of Art, 1936
National Gallery of Art, 1775
National Gallery of Art, 1985
National Gallery of Art, 1877
National Gallery of Art, 1994
National Gallery of Art, 1937
Williams, Dave H. and Reba W., 1938
National Gallery of Art, 1800
National Gallery of Art, 1976
National Gallery of Art, 1834
![Flagstones (a) [trial proof 1]](https://api.nga.gov/iiif/1c96e21f-d0cc-41db-94a6-48a60e7ef83b/full/843,/0/default.jpg)
