The National Co-operator and Farm Journal (Dallas, Tex.), Vol. 28, No. 24, Ed. 1 Wednesday, March 20, 1907, newspaper, March 20, 1907; (https://texashistory.unt.edu/ark:/67531/metapth186282/m1/1/: accessed June 2, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .