Waiterless Restaurant, patent, September 6, 1921; (https://texashistory.unt.edu/ark:/67531/metapth1258697/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Waiterless Restaurant, patent, September 6, 1921; (https://texashistory.unt.edu/ark:/67531/metapth1258697/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .