Triple Valve, patent, August 13, 1912; (https://texashistory.unt.edu/ark:/67531/metapth511454/m1/1/: accessed June 30, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Triple Valve, patent, August 13, 1912; (https://texashistory.unt.edu/ark:/67531/metapth511454/m1/1/: accessed June 30, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .