Method of making blocks of fuel, patent, July 16, 1900; (https://texashistory.unt.edu/ark:/67531/metapth514814/m1/1/: accessed July 5, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Method of making blocks of fuel, patent, July 16, 1900; (https://texashistory.unt.edu/ark:/67531/metapth514814/m1/1/: accessed July 5, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .