Yielding Power-Coupling, patent, February 18, 1908; (https://texashistory.unt.edu/ark:/67531/metapth511560/m1/4/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Yielding Power-Coupling, patent, February 18, 1908; (https://texashistory.unt.edu/ark:/67531/metapth511560/m1/4/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .