Carswell, T. N. (Thomas Norwood). [Letter from T. N. Carswell to Mrs. Beatrice Jackson - January 31, 1968], letter, January 31, 1968; (https://texashistory.unt.edu/ark:/67531/metapth1398698/m1/1/: accessed May 21, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .