Blackshear, A. H., Jr. [Letter from A. H. Blackshear, Jr. to Daniel W. Kempner, September 7, 1955], letter, September 7, 1955; (https://texashistory.unt.edu/ark:/67531/metapth1345556/m1/1/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .