Grab for Pump and Drill Rods., patent, May 11, 1909; (https://texashistory.unt.edu/ark:/67531/metapth513111/m1/2/: accessed July 6, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Grab for Pump and Drill Rods., patent, May 11, 1909; (https://texashistory.unt.edu/ark:/67531/metapth513111/m1/2/: accessed July 6, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .