Dallas (Tex.). Police Department. [Report to W. P. Gannaway by P. M. Parks, February 4, 1964], report, February 4, 1964; (https://texashistory.unt.edu/ark:/67531/metapth339075/m1/1/: accessed July 23, 2019), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .