Shoe Blacking and Polishing Machine, patent, June 25, 1912; (https://texashistory.unt.edu/ark:/67531/metapth514191/m1/1/: accessed June 20, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Shoe Blacking and Polishing Machine, patent, June 25, 1912; (https://texashistory.unt.edu/ark:/67531/metapth514191/m1/1/: accessed June 20, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .