Railway Appliance., patent, July 21, 1903; (https://texashistory.unt.edu/ark:/67531/metapth512445/m1/1/: accessed June 30, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Railway Appliance., patent, July 21, 1903; (https://texashistory.unt.edu/ark:/67531/metapth512445/m1/1/: accessed June 30, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .