Seminole Sentinel (Seminole, Tex.), Vol. 57, No. 31, Ed. 1 Thursday, June 18, 1964, newspaper, June 18, 1964; (https://texashistory.unt.edu/ark:/67531/metapth417486/m1/1/: accessed July 9, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .