Carswell, T. N. (Thomas Norwood). [Letter from T. N. Carswell to Colonel Gudera - March 31, 1941], letter, March 31, 1941; (https://texashistory.unt.edu/ark:/67531/metapth1397733/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .