Door Hanger., patent, September 15, 1914; (https://texashistory.unt.edu/ark:/67531/metapth859406/m1/1/: accessed June 20, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Door Hanger., patent, September 15, 1914; (https://texashistory.unt.edu/ark:/67531/metapth859406/m1/1/: accessed June 20, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .