The Mathis News (Mathis, Tex.), Vol. 47, No. 33, Ed. 1 Thursday, April 25, 1968, newspaper, April 25, 1968; (https://texashistory.unt.edu/ark:/67531/metapth1205921/m1/1/: accessed April 27, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .