Wrist-Guide and Foot-Guard for Pianos., patent, May 18, 1897; (https://texashistory.unt.edu/ark:/67531/metapth174614/m1/2/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Wrist-Guide and Foot-Guard for Pianos., patent, May 18, 1897; (https://texashistory.unt.edu/ark:/67531/metapth174614/m1/2/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .