Westphal, R. W. [Report to W. P. Gannaway by R. W. Westphal, January 30, 1964], report, January 30, 1964; (https://texashistory.unt.edu/ark:/67531/metapth338020/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .