Building Structure, patent, May 5, 1908; (https://texashistory.unt.edu/ark:/67531/metapth513712/m1/2/: accessed July 5, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Building Structure, patent, May 5, 1908; (https://texashistory.unt.edu/ark:/67531/metapth513712/m1/2/: accessed July 5, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .