The Thresher (Houston, Tex.), Vol. 4, No. 13, Ed. 1 Thursday, May 1, 1919, newspaper, May 1, 1919; (https://texashistory.unt.edu/ark:/67531/metapth229829/m1/1/: accessed April 25, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .