Churn., patent, September 11, 1883; (https://texashistory.unt.edu/ark:/67531/metapth170616/m1/1/: accessed June 15, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Churn., patent, September 11, 1883; (https://texashistory.unt.edu/ark:/67531/metapth170616/m1/1/: accessed June 15, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .