Grain-Drill., patent, June 6, 1893; (https://texashistory.unt.edu/ark:/67531/metapth173437/m1/1/: accessed June 22, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Grain-Drill., patent, June 6, 1893; (https://texashistory.unt.edu/ark:/67531/metapth173437/m1/1/: accessed June 22, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .