Litvin, Sam. [Letter from Sam Litvin to Daniel W. Kempner, July 11, 1955], letter, July 11, 1955; (https://texashistory.unt.edu/ark:/67531/metapth1384170/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .