Stalk-Chopper, patent, December 22, 1908; (https://texashistory.unt.edu/ark:/67531/metapth511565/m1/1/: accessed April 24, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Stalk-Chopper, patent, December 22, 1908; (https://texashistory.unt.edu/ark:/67531/metapth511565/m1/1/: accessed April 24, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .