Grave-Cover, patent, September 19, 1912; (https://texashistory.unt.edu/ark:/67531/metapth511575/m1/1/: accessed June 22, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Grave-Cover, patent, September 19, 1912; (https://texashistory.unt.edu/ark:/67531/metapth511575/m1/1/: accessed June 22, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .