Wrench, patent, July 25, 1911; (https://texashistory.unt.edu/ark:/67531/metapth509664/m1/1/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Wrench, patent, July 25, 1911; (https://texashistory.unt.edu/ark:/67531/metapth509664/m1/1/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .