Cotton-Picker, patent, February 25, 1913; (https://texashistory.unt.edu/ark:/67531/metapth510400/m1/4/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Cotton-Picker, patent, February 25, 1913; (https://texashistory.unt.edu/ark:/67531/metapth510400/m1/4/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .