Martin, Crawford C. [Letter from Crawford C. Martin to I. H. Kempner, March 5, 1951], letter, March 5, 1951; (https://texashistory.unt.edu/ark:/67531/metapth1501814/m1/1/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .