Guard-Rail., patent, May 8, 1900; (https://texashistory.unt.edu/ark:/67531/metapth514613/m1/1/: accessed June 22, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Guard-Rail., patent, May 8, 1900; (https://texashistory.unt.edu/ark:/67531/metapth514613/m1/1/: accessed June 22, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .