1964
National Gallery of Art, 1929
National Gallery of Art, 1967
National Gallery of Art, 1782
National Gallery of Art, 1627
National Gallery of Art, 1953
National Gallery of Art, 1670
National Gallery of Art, 1939
National Gallery of Art, 1944
National Gallery of Art, 1938
National Gallery of Art, 1817
National Gallery of Art, 1937
National Gallery of Art, 1622
![Entwurf zu "Vogelspiel" (Sketch for "Birdplay") [p. 31]](https://api.nga.gov/iiif/09dbd1de-8492-417e-8571-fe45ac9cd6c5/full/843,/0/default.jpg)
