Safety Oil-Tank, patent, May 6, 1913; (https://texashistory.unt.edu/ark:/67531/metapth853678/m1/1/: accessed June 22, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Safety Oil-Tank, patent, May 6, 1913; (https://texashistory.unt.edu/ark:/67531/metapth853678/m1/1/: accessed June 22, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .