Johnson, Rupert H. [Letter from R. H. Johnson to T. N. Carswell - September 8, 1948], letter, September 8, 1948; (https://texashistory.unt.edu/ark:/67531/metapth1398347/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .