Automatic Controller for Cotton Trampers, patent, June 1, 1915; (https://texashistory.unt.edu/ark:/67531/metapth859831/m1/2/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Automatic Controller for Cotton Trampers, patent, June 1, 1915; (https://texashistory.unt.edu/ark:/67531/metapth859831/m1/2/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .