The Delta Courier (Cooper, Tex.), Vol. 59, No. 18, Ed. 1 Tuesday, April 30, 1940, newspaper, April 30, 1940; (https://texashistory.unt.edu/ark:/67531/metapth895560/m1/1/: accessed November 19, 2018), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .