Cohen, David. [Letter from David Cohen to I. H. Kempner, February 6, 1949], letter, February 6, 1949; (https://texashistory.unt.edu/ark:/67531/metapth1471570/m1/1/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .