Railroad Switch, patent, October 16, 1906; (https://texashistory.unt.edu/ark:/67531/metapth514115/m1/1/: accessed July 4, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Railroad Switch, patent, October 16, 1906; (https://texashistory.unt.edu/ark:/67531/metapth514115/m1/1/: accessed July 4, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .