Steering Device and Brake for Tractors, patent, January 10, 1922; (https://texashistory.unt.edu/ark:/67531/metapth1257920/m1/1/: accessed June 23, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Steering Device and Brake for Tractors, patent, January 10, 1922; (https://texashistory.unt.edu/ark:/67531/metapth1257920/m1/1/: accessed June 23, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .