Type Writing Machine, patent, January 3, 1911; (https://texashistory.unt.edu/ark:/67531/metapth512437/m1/1/: accessed June 29, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Type Writing Machine, patent, January 3, 1911; (https://texashistory.unt.edu/ark:/67531/metapth512437/m1/1/: accessed June 29, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .