Ditching-Plow., patent, March 26, 1912; (https://texashistory.unt.edu/ark:/67531/metapth511960/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Ditching-Plow., patent, March 26, 1912; (https://texashistory.unt.edu/ark:/67531/metapth511960/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .