Toler, Henry Wilson.Combined Grubbing, Subsoiling, and Turning Plow,
patent,
May 23, 1905;
[Washington D.C.].
(https://texashistory.unt.edu/ark:/67531/metapth509028/m1/1/:
accessed July 10, 2024),
University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu;
crediting UNT Libraries Government Documents Department.