The Houston Post. (Houston, Tex.), Vol. 37, No. 78, Ed. 1 Tuesday, June 21, 1921, newspaper, June 21, 1921; (https://texashistory.unt.edu/ark:/67531/metapth609240/m1/1/: accessed December 16, 2018), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .