Dirigible Headlight., patent, January 14, 1919; (https://texashistory.unt.edu/ark:/67531/metapth1256758/m1/1/: accessed June 30, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Dirigible Headlight., patent, January 14, 1919; (https://texashistory.unt.edu/ark:/67531/metapth1256758/m1/1/: accessed June 30, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .