Vending-Machine, patent, October 25, 1910; (https://texashistory.unt.edu/ark:/67531/metapth513514/m1/6/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Vending-Machine, patent, October 25, 1910; (https://texashistory.unt.edu/ark:/67531/metapth513514/m1/6/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .