Disk Plow, patent, April 2, 1907; (https://texashistory.unt.edu/ark:/67531/metapth509519/m1/1/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Disk Plow, patent, April 2, 1907; (https://texashistory.unt.edu/ark:/67531/metapth509519/m1/1/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .