Double-Lever Brake., patent, March 23, 1920; (https://texashistory.unt.edu/ark:/67531/metapth1257260/m1/1/: accessed July 6, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Double-Lever Brake., patent, March 23, 1920; (https://texashistory.unt.edu/ark:/67531/metapth1257260/m1/1/: accessed July 6, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .