Pump Rod Coupling, patent, March 19, 1907; (https://texashistory.unt.edu/ark:/67531/metapth512329/m1/2/: accessed June 26, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Pump Rod Coupling, patent, March 19, 1907; (https://texashistory.unt.edu/ark:/67531/metapth512329/m1/2/: accessed June 26, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .