Triple Valve., patent, July 26, 1910; (https://texashistory.unt.edu/ark:/67531/metapth509565/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Triple Valve., patent, July 26, 1910; (https://texashistory.unt.edu/ark:/67531/metapth509565/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .