Propeller, patent, July 23, 1912; (https://texashistory.unt.edu/ark:/67531/metapth515030/m1/4/: accessed June 26, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Propeller, patent, July 23, 1912; (https://texashistory.unt.edu/ark:/67531/metapth515030/m1/4/: accessed June 26, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .