Hoffman, J. T. [Letter from J. T. Hoffman, Jr. to H. Kempner, March 6, 1957], letter, March 6, 1957; (https://texashistory.unt.edu/ark:/67531/metapth1477181/m1/1/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .