[Letter from Jeane B. Kempner to the Postmaster, October 26, 1956], letter, October 26, 1956; (https://texashistory.unt.edu/ark:/67531/metapth1361156/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .