Cultivator-Shovel, patent, December 19, 1902; (https://texashistory.unt.edu/ark:/67531/metapth512334/m1/1/: accessed July 1, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Cultivator-Shovel, patent, December 19, 1902; (https://texashistory.unt.edu/ark:/67531/metapth512334/m1/1/: accessed July 1, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .