Polk County Enterprise (Livingston, Tex.), Vol. 95, No. 48, Ed. 1 Sunday, June 19, 1977, newspaper, June 19, 1977; (https://texashistory.unt.edu/ark:/67531/metapth781461/m1/1/: accessed April 23, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .