Hay-Press., patent, August 11, 1891; (https://texashistory.unt.edu/ark:/67531/metapth172761/m1/2/: accessed July 6, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Hay-Press., patent, August 11, 1891; (https://texashistory.unt.edu/ark:/67531/metapth172761/m1/2/: accessed July 6, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .