Attachment for Cultivators, patent, August 25, 1903; (https://texashistory.unt.edu/ark:/67531/metapth514842/m1/1/: accessed July 5, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Attachment for Cultivators, patent, August 25, 1903; (https://texashistory.unt.edu/ark:/67531/metapth514842/m1/1/: accessed July 5, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .