Improvement in Clay Grinder and Mixer., patent, May 27, 1879; (https://texashistory.unt.edu/ark:/67531/metapth169839/m1/1/: accessed July 4, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Improvement in Clay Grinder and Mixer., patent, May 27, 1879; (https://texashistory.unt.edu/ark:/67531/metapth169839/m1/1/: accessed July 4, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .