Automatic Stopping Mechanism for Trains, patent, October 25, 1910; (https://texashistory.unt.edu/ark:/67531/metapth511626/m1/1/: accessed July 4, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Automatic Stopping Mechanism for Trains, patent, October 25, 1910; (https://texashistory.unt.edu/ark:/67531/metapth511626/m1/1/: accessed July 4, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .