Disk Cultivator, patent, May 12, 1914; (https://texashistory.unt.edu/ark:/67531/metapth858425/m1/2/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Disk Cultivator, patent, May 12, 1914; (https://texashistory.unt.edu/ark:/67531/metapth858425/m1/2/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .