Road-Grader, patent, January 18, 1916; (https://texashistory.unt.edu/ark:/67531/metapth858823/m1/1/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Road-Grader, patent, January 18, 1916; (https://texashistory.unt.edu/ark:/67531/metapth858823/m1/1/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .