Kempner, Isaac H. (Isaac Herbert), 1873-1967. [Letter from I. H. Kempner to Daniel W. Kempner, June 1, 1944], letter, June 1, 1944; (https://texashistory.unt.edu/ark:/67531/metapth1451871/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .