Horton, Aimee Isgrig. The Highlander Folk School: A History of Its Major Programs, 1932-1961. Brooklyn, N.Y.: Carlson Publishing, 1989. Includes a section about Lawrence as Highlander extension director (p.130-37). See index for additional coverage.

Glen, John M. Highlander, No Ordinary School, 1932-1962. Lexington: University Press of Kentucky, 1988. 309p.
This work also includes information about Lawrence's extension work (p.77-85).