Clevis Attachment for Plows., patent, February 13, 1920; (https://texashistory.unt.edu/ark:/67531/metapth1259349/m1/1/: accessed June 3, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Clevis Attachment for Plows., patent, February 13, 1920; (https://texashistory.unt.edu/ark:/67531/metapth1259349/m1/1/: accessed June 3, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .