Here are some examples of literature about or by Robert C. Tryon, the chief creator of the BCTRY program:
Dean (2020). Robert Choate Tryon, 1901-1967, bibliography.
Schlesinger (1991). Robert Choate Tryon: pioneer in differential psychology.
Tolman and Tryon (1992). Early research on the inheritance of the ability to learn.
Hirsch and Tryon (1956). Mass screening and reliable individual measurement in the experimental behavior genetics of lower organisms.