Mouse and Rat Poisoner., patent, October 11, 1921; (https://texashistory.unt.edu/ark:/67531/metapth1257732/m1/1/: accessed June 21, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Mouse and Rat Poisoner., patent, October 11, 1921; (https://texashistory.unt.edu/ark:/67531/metapth1257732/m1/1/: accessed June 21, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .