Post, patent, January 24, 1911; (https://texashistory.unt.edu/ark:/67531/metapth510811/m1/2/: accessed July 5, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Post, patent, January 24, 1911; (https://texashistory.unt.edu/ark:/67531/metapth510811/m1/2/: accessed July 5, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .