[Letter from T. N. Carswell to the State Director of Selective Service, Texas - March 21, 1944], letter, March 21, 1944; (https://texashistory.unt.edu/ark:/67531/metapth1397211/m1/1/: accessed July 7, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .