Utilizing Sulfur-Containing Petroleum., patent, February 20, 1912; (https://texashistory.unt.edu/ark:/67531/metapth508508/m1/2/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Utilizing Sulfur-Containing Petroleum., patent, February 20, 1912; (https://texashistory.unt.edu/ark:/67531/metapth508508/m1/2/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .