Gregory, Thomas R. [Report from Thomas R. Gregory to Chief J. E. Curry, November 27, 1963], report, November 27, 1963; (https://texashistory.unt.edu/ark:/67531/metapth337747/m1/1/: accessed July 12, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .