Motor- Driven Tire- Pump, patent, February 8, 1921; (https://texashistory.unt.edu/ark:/67531/metapth1258399/m1/2/: accessed July 12, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Motor- Driven Tire- Pump, patent, February 8, 1921; (https://texashistory.unt.edu/ark:/67531/metapth1258399/m1/2/: accessed July 12, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .