1983–1986
Petersburg Press, 1976
Hauslohner, Robert A., Mr. and Mrs., 1983
Petersburg Press, 1971
Francesco Clemente, 1983
Francesco Clemente, 1981
Petersburg Press, 1983
Rolf Neumann, 1983
Petersburg Press, 1969
Petersburg Press, 1979
![Words [trial proof 2]](https://api.nga.gov/iiif/a8f6aade-8ce1-4730-916a-dfbd5dc51b7e/full/843,/0/default.jpg)
![Flagstones (a) [trial proof 4]](https://api.nga.gov/iiif/9bdce20f-9ef6-48c5-9427-34ec501deab4/full/843,/0/default.jpg)
![Figure 5 [trial proof 4]](https://api.nga.gov/iiif/fcef055c-ed92-4a7b-9d26-b80f8c8401ea/full/843,/0/default.jpg)
![Target with Four Faces [trial proof]](https://api.nga.gov/iiif/8daf9caa-57cf-4cc9-8417-3e8bc38c02e5/full/843,/0/default.jpg)