Washboiler, patent, April 28, 1908; (https://texashistory.unt.edu/ark:/67531/metapth513820/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Washboiler, patent, April 28, 1908; (https://texashistory.unt.edu/ark:/67531/metapth513820/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .