Mechanical Movement, patent, November 9, 1915; (https://texashistory.unt.edu/ark:/67531/metapth858432/m1/3/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Mechanical Movement, patent, November 9, 1915; (https://texashistory.unt.edu/ark:/67531/metapth858432/m1/3/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .