Washboard., patent, July 28, 1914; (https://texashistory.unt.edu/ark:/67531/metapth859959/m1/1/: accessed June 19, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Washboard., patent, July 28, 1914; (https://texashistory.unt.edu/ark:/67531/metapth859959/m1/1/: accessed June 19, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .