[Letter from I. H. Kempner to Twelfth United States Civil Service Region, December 6, 1948], letter, December 6, 1948; (https://texashistory.unt.edu/ark:/67531/metapth1447439/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .