Colter Attachment for Plows., patent, July 19, 1898; (https://texashistory.unt.edu/ark:/67531/metapth511231/m1/1/: accessed June 10, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Colter Attachment for Plows., patent, July 19, 1898; (https://texashistory.unt.edu/ark:/67531/metapth511231/m1/1/: accessed June 10, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .