Cotton Retainer or Dog, patent, October 1, 1918; (https://texashistory.unt.edu/ark:/67531/metapth1259169/m1/1/: accessed July 4, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Cotton Retainer or Dog, patent, October 1, 1918; (https://texashistory.unt.edu/ark:/67531/metapth1259169/m1/1/: accessed July 4, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .