Wrench, patent, May 9, 1916; (https://texashistory.unt.edu/ark:/67531/metapth859792/m1/2/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Wrench, patent, May 9, 1916; (https://texashistory.unt.edu/ark:/67531/metapth859792/m1/2/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .