Improvement In Machines For Filing Saws., patent, August 19, 1879; (https://texashistory.unt.edu/ark:/67531/metapth169875/m1/1/: accessed June 20, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Improvement In Machines For Filing Saws., patent, August 19, 1879; (https://texashistory.unt.edu/ark:/67531/metapth169875/m1/1/: accessed June 20, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .