Plow., patent, March 10, 1891; (https://texashistory.unt.edu/ark:/67531/metapth172628/m1/1/: accessed May 4, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Plow., patent, March 10, 1891; (https://texashistory.unt.edu/ark:/67531/metapth172628/m1/1/: accessed May 4, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .