The National Co-Operator (Mineola, Tex.), Vol. 2, No. 10, Ed. 1 Wednesday, March 21, 1906, newspaper, March 21, 1906; (https://texashistory.unt.edu/ark:/67531/metapth254307/m1/1/: accessed April 27, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .