Well-Drilling Machine, patent, June 26, 1888; (https://texashistory.unt.edu/ark:/67531/metapth171783/m1/1/: accessed July 12, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Well-Drilling Machine, patent, June 26, 1888; (https://texashistory.unt.edu/ark:/67531/metapth171783/m1/1/: accessed July 12, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .