Process For Treating Crude Oil, patent, March 8, 1912; (https://texashistory.unt.edu/ark:/67531/metapth858531/m1/2/: accessed July 5, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Process For Treating Crude Oil, patent, March 8, 1912; (https://texashistory.unt.edu/ark:/67531/metapth858531/m1/2/: accessed July 5, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .