[Letter from W. & J. Sloan to Mrs. D. Kempner, March 9, 1949], letter, March 9, 1949; (https://texashistory.unt.edu/ark:/67531/metapth1342696/m1/2/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .