Mantel., patent, June 26, 1900; (https://texashistory.unt.edu/ark:/67531/metapth510705/m1/1/: accessed July 12, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Mantel., patent, June 26, 1900; (https://texashistory.unt.edu/ark:/67531/metapth510705/m1/1/: accessed July 12, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .