Dallas (Tex.). Police Department. [Letter to Lee Harvey Oswald from Arnold Johnson, July 31, 1963], letter, July 31, 1963; (https://texashistory.unt.edu/ark:/67531/metapth339515/m1/2/: accessed April 25, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .