Pump-Plunger, patent, April 7, 1903; (https://texashistory.unt.edu/ark:/67531/metapth514218/m1/3/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Pump-Plunger, patent, April 7, 1903; (https://texashistory.unt.edu/ark:/67531/metapth514218/m1/3/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .