Track-Laying Apparatus, patent, October 24, 1911; (https://texashistory.unt.edu/ark:/67531/metapth508225/m1/1/: accessed June 19, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Track-Laying Apparatus, patent, October 24, 1911; (https://texashistory.unt.edu/ark:/67531/metapth508225/m1/1/: accessed June 19, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .