Savage, H. W.; Compere, E. L.; MacPherson, R. E.; Huntley, W. R. & Taboada, A. Snap-8 Corrosion Program Quarterly Progress Report for Period Ending November 30, 1964, report, March 1965; (https://digital.library.unt.edu/ark:/67531/metadc100310/m1/1/: accessed June 20, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .