Montablo, Philip J. [Letter from Philip J. Montablo to John J. Herrera - 1963-10-10], letter, October 10, 1963; (https://texashistory.unt.edu/ark:/67531/metapth250678/m1/1/: accessed July 12, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .