Oppenheimer, Ann. [Letter from Ann Oppenheimer to Ruth and Harris Kempner, November 20, 1965], letter, 1965-11-20~; (https://texashistory.unt.edu/ark:/67531/metapth1425368/m1/1/: accessed July 8, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .