[Report to W. P. Gannaway by W. S. Biggio, January 9, 1964], report, January 9, 1964; (https://texashistory.unt.edu/ark:/67531/metapth339732/m1/1/: accessed June 25, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .