1. W. A. Rentz and M. J. Donachie, ASM Tech. Rep. No. C6-18.5 (1966).
2. C. A. Barrett, E. B. Evans, and W. M. Baldwin, Jr., Case Inst. Tech. Tech. Rep. 3 (1955).
3. N. Birks and H. Rickert,J. Inst. Met. 91, 308 (1962?63).
4. G. C. Wood, T. Hodgkiess, and D. P. Whittle,Corros. Sci. 6, 129 (1966).
5. C. S. Giggins and F. S. Pettit,Trans. AIME 245, 2495 (1969).