[Letter from Daniel W. Kempner to Alexander Lifschuetz, November 21, 1950], letter, November 21, 1950; (https://texashistory.unt.edu/ark:/67531/metapth1329502/m1/1/: accessed July 7, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .