1922 - Letter-Grade System Established
SOURCES
The University of North Carolina Record. The Catalogue, 1922-1923. Chapel Hill, N.C. : University of North Carolina at Chapel Hill, 1923, p. 93, https://lib.digitalnc.org/record/35697#?c=0&m=0&s=0&cv=0&r=0&xywh=-2122%2C-1%2C6585%2C4002.