Trap., patent, June 27, 1922; (https://texashistory.unt.edu/ark:/67531/metapth1258792/m1/1/: accessed June 30, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Trap., patent, June 27, 1922; (https://texashistory.unt.edu/ark:/67531/metapth1258792/m1/1/: accessed June 30, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .