Metal Cross Tie for Railroads., patent, May 27, 1890; (https://texashistory.unt.edu/ark:/67531/metapth172371/m1/1/: accessed July 1, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Metal Cross Tie for Railroads., patent, May 27, 1890; (https://texashistory.unt.edu/ark:/67531/metapth172371/m1/1/: accessed July 1, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .