Improvement in Soldering-Irons, patent, March 21, 1877; (https://texashistory.unt.edu/ark:/67531/metapth166710/m1/1/: accessed June 20, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Improvement in Soldering-Irons, patent, March 21, 1877; (https://texashistory.unt.edu/ark:/67531/metapth166710/m1/1/: accessed June 20, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .