Plow, patent, March 9, 1915; (https://texashistory.unt.edu/ark:/67531/metapth858106/m1/1/: accessed May 21, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Plow, patent, March 9, 1915; (https://texashistory.unt.edu/ark:/67531/metapth858106/m1/1/: accessed May 21, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .