Vehicle-Spring., patent, June 7, 1910; (https://texashistory.unt.edu/ark:/67531/metapth510293/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Vehicle-Spring., patent, June 7, 1910; (https://texashistory.unt.edu/ark:/67531/metapth510293/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .