Kigoshi, A & Strickland, G. MONEL AND NICKEL CORROSION IN NONAQUEOUS NO$sub 2$--HF SOLUTIONS., report, January 1, 1966; (https://digital.library.unt.edu/ark:/67531/metadc1026951/m1/1/: accessed September 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .