[Letter from D. W. Kempner to Fanny Hamburger, November 28, 1949 #1], letter, November 28, 1949; (https://texashistory.unt.edu/ark:/67531/metapth1341372/m1/2/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .