Grain-Door For Freight-Cars., patent, March 6, 1900; (https://texashistory.unt.edu/ark:/67531/metapth514037/m1/1/: accessed June 22, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Grain-Door For Freight-Cars., patent, March 6, 1900; (https://texashistory.unt.edu/ark:/67531/metapth514037/m1/1/: accessed June 22, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .