Cohen, Dave. [Letter from Dave Cohen to I. H. Kempner, April 2, 1939], letter, April 2, 1939; (https://texashistory.unt.edu/ark:/67531/metapth1452272/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .