Kempner, Cecile Blum. [Letter from Cecile Kempner to Arthur Alpert, February 15, 1964], letter, February 15, 1964; (https://texashistory.unt.edu/ark:/67531/metapth1325290/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .