[Letter from Harris Leon Kempner to Mr. Jose Lacerda, April 11, 1963], letter, April 11, 1963; (https://texashistory.unt.edu/ark:/67531/metapth1437257/m1/2/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .