Vehicle-Step., patent, January 30, 1900; (https://texashistory.unt.edu/ark:/67531/metapth508185/m1/1/: accessed June 19, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Vehicle-Step., patent, January 30, 1900; (https://texashistory.unt.edu/ark:/67531/metapth508185/m1/1/: accessed June 19, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .