Spring Wheel, patent, November 22, 1911; (https://texashistory.unt.edu/ark:/67531/metapth514800/m1/1/: accessed June 26, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Spring Wheel, patent, November 22, 1911; (https://texashistory.unt.edu/ark:/67531/metapth514800/m1/1/: accessed June 26, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .