For another impression of the first in the collection of the Museum of Fine Arts Boston, accession number RES.23.303-5, go to www.mfa.org/collections
For another impression of the first in the collection of the Arthur M. Sackler Museum, Harvard Art Museums, object number 1944.5.9, go to http://www.harvardartmuseums.org/art/203576
For another impression of the second in the collection of the Arthur M. Sackler Museum, Harvard Art Museums, object number 1944.5.4, go to http://www.harvardartmuseums.org/art/203236
For another impression of the third in the collection of the Museum of Fine Arts Boston, accession number 65.417a-c, go to www.mfa.org/collections
For another impression of the third in the collection of the British Museum, registration number 1941,1010,0.1.1-3, go to www.britishmuseum.org/research