Is your relative mentioned in a statewide report of any kind? This 1940 reference comes from the Proceedings of the Teacher College Board of the State of Illinois... and mentions the 1940 degree graduates, including my great aunt.
Graduates of state-sponsored schools may be mentioned in reports of this type. State schools for the deaf, blind, etc. also may have submitted reports.
Items such as these are increasingly being put online on sites such as Google Books, Archive.org, etc.