Monocycle., patent, March 9, 1909; (https://texashistory.unt.edu/ark:/67531/metapth512416/m1/4/: accessed June 23, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Monocycle., patent, March 9, 1909; (https://texashistory.unt.edu/ark:/67531/metapth512416/m1/4/: accessed June 23, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .