Cotton-Chopper, patent, December 26, 1905; (https://texashistory.unt.edu/ark:/67531/metapth513271/m1/2/: accessed June 22, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Cotton-Chopper, patent, December 26, 1905; (https://texashistory.unt.edu/ark:/67531/metapth513271/m1/2/: accessed June 22, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .