Kempner, Isaac Herbert, Jr. [Letter from Isaac H. Kempner, Jr. to H. W. Tripp, December 27, 1949], letter, December 27, 1949; (https://texashistory.unt.edu/ark:/67531/metapth1486389/m1/1/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .