Plow., patent, March 11, 1879; (https://texashistory.unt.edu/ark:/67531/metapth169816/m1/1/: accessed June 23, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Plow., patent, March 11, 1879; (https://texashistory.unt.edu/ark:/67531/metapth169816/m1/1/: accessed June 23, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .