Cotton-Chopper., patent, November 2, 1897; (https://texashistory.unt.edu/ark:/67531/metapth510557/m1/1/: accessed July 12, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Cotton-Chopper., patent, November 2, 1897; (https://texashistory.unt.edu/ark:/67531/metapth510557/m1/1/: accessed July 12, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .