Hay-Press, patent, January 26, 1909; (https://texashistory.unt.edu/ark:/67531/metapth512893/m1/1/: accessed June 27, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Hay-Press, patent, January 26, 1909; (https://texashistory.unt.edu/ark:/67531/metapth512893/m1/1/: accessed June 27, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .