The McKinney Examiner (McKinney, Tex.), Vol. 81, No. 37, Ed. 1 Thursday, May 30, 1968, newspaper, May 30, 1968; (https://texashistory.unt.edu/ark:/67531/metapth1564371/m1/1/: accessed July 1, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .