Trailer., patent, August 28, 1917; (https://texashistory.unt.edu/ark:/67531/metapth854104/m1/2/: accessed June 26, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Trailer., patent, August 28, 1917; (https://texashistory.unt.edu/ark:/67531/metapth854104/m1/2/: accessed June 26, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .