Thill-Coupling., patent, July 30, 1895; (https://texashistory.unt.edu/ark:/67531/metapth174056/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Thill-Coupling., patent, July 30, 1895; (https://texashistory.unt.edu/ark:/67531/metapth174056/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .