1969–1970
Robert A. Brown, 1981
Collectors Committee, 1969
R. B. Kitaj, 1989
Collectors Committee, 2003
Collectors Committee, 2004
Kelpra Studio, 1969
Collectors Committee, 1984
Collectors Committee, 1997
Robert A. Brown, 1939
R. B. Kitaj, 1969
![Eco del reloj [Clock Echo]](https://api.nga.gov/iiif/090d9aa1-ca72-4c49-8202-a0919ef133f2/full/843,/0/default.jpg)
![Agosto [August]](https://api.nga.gov/iiif/7c4a273c-2eff-4238-aa6e-9fb4a1d86a74/full/843,/0/default.jpg)