Wiggins, Lois. [Letter from Lois Wiggins to T. N. Carswell - March 19, 1968], letter, March 19, 1968; (https://texashistory.unt.edu/ark:/67531/metapth1398888/m1/1/: accessed June 23, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .