Hay-Press, patent, November 12, 1912; (https://texashistory.unt.edu/ark:/67531/metapth509258/m1/1/: accessed June 22, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Hay-Press, patent, November 12, 1912; (https://texashistory.unt.edu/ark:/67531/metapth509258/m1/1/: accessed June 22, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .