Process of Manufacturing Soap., patent, March 29, 1892; (https://texashistory.unt.edu/ark:/67531/metapth172989/m1/2/: accessed June 28, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Process of Manufacturing Soap., patent, March 29, 1892; (https://texashistory.unt.edu/ark:/67531/metapth172989/m1/2/: accessed June 28, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .