Cullinane, Steven H. Diamond theory :
printed (signed), 1976., 1976..
W. V. Quine papers, MS Am 2587, (1611).
Houghton Library, Harvard College Library.
https://id.lib.harvard.edu/ead/c/
hou01800c01663/catalog
Accessed January 21, 2021
Source of citation —
https://hollisarchives.lib.harvard.edu/
repositories/24/archival_objects/809161 .
For the content — just the first 12 pages —
see http://www.log24.com/log/
Diamond_Theory-1976-pp-1-12.pdf .
Later observations —
“Finite Geometry website of Steven H. Cullinane,”
archived at
https://dataverse.harvard.edu/dataset.xhtml?
persistentId=doi%3A10.7910%2FDVN%2FKHMMVH .