The Houston Post. (Houston, Tex.), Vol. 34, No. 17, Ed. 1 Sunday, April 21, 1918, newspaper, April 21, 1918; (https://texashistory.unt.edu/ark:/67531/metapth610535/m1/4/: accessed May 4, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .