Sullivan, J. E. A Comparison of Corrosion-Resistant Steel (18 Percent Chromium - 8 Percent Nickel) and Aluminum Alloy (24st), report, March 1936; (https://digital.library.unt.edu/ark:/67531/metadc54153/m1/1/: accessed November 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .