Improvement in Automatic-Gates., patent, March 3, 1874; (https://texashistory.unt.edu/ark:/67531/metapth166940/m1/1/: accessed July 7, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Improvement in Automatic-Gates., patent, March 3, 1874; (https://texashistory.unt.edu/ark:/67531/metapth166940/m1/1/: accessed July 7, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .