Kempner, Isaac Herbert, Jr. [Letter from I. H. Kempner, Jr. to Paul B. Caster, June 6, 1946], letter, June 6, 1946; (https://texashistory.unt.edu/ark:/67531/metapth1209983/m1/1/: accessed April 26, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .