Cotton Chopper or Blocker., patent, October 16, 1917; (https://texashistory.unt.edu/ark:/67531/metapth853572/m1/1/: accessed July 15, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Cotton Chopper or Blocker., patent, October 16, 1917; (https://texashistory.unt.edu/ark:/67531/metapth853572/m1/1/: accessed July 15, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .