Kempner, Isaac H. (Isaac Herbert), 1873-1967. [Letter from Isaac H. Kempner to Braniff Airways, March 2, 1945], letter, March 2, 1945; (https://texashistory.unt.edu/ark:/67531/metapth1452052/m1/1/: accessed July 4, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .