Cultivator Attachment, patent, December 22, 1908; (https://texashistory.unt.edu/ark:/67531/metapth513091/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Cultivator Attachment, patent, December 22, 1908; (https://texashistory.unt.edu/ark:/67531/metapth513091/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .