Harrow-Tooth, patent, September 25, 1905; (https://texashistory.unt.edu/ark:/67531/metapth508211/m1/2/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Harrow-Tooth, patent, September 25, 1905; (https://texashistory.unt.edu/ark:/67531/metapth508211/m1/2/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .