Millstone-Drivers, patent, October 14, 1879; (https://texashistory.unt.edu/ark:/67531/metapth170094/m1/1/: accessed April 26, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Millstone-Drivers, patent, October 14, 1879; (https://texashistory.unt.edu/ark:/67531/metapth170094/m1/1/: accessed April 26, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .