Hydraulic Swivel, patent, September 26, 1905; (https://texashistory.unt.edu/ark:/67531/metapth509253/m1/2/: accessed July 3, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Hydraulic Swivel, patent, September 26, 1905; (https://texashistory.unt.edu/ark:/67531/metapth509253/m1/2/: accessed July 3, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .