Process for Clarifying Oil, patent, November 12, 1918; (https://texashistory.unt.edu/ark:/67531/metapth1258895/m1/1/: accessed June 26, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Process for Clarifying Oil, patent, November 12, 1918; (https://texashistory.unt.edu/ark:/67531/metapth1258895/m1/1/: accessed June 26, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .