1. P. Doig and J. W. Edington:Brit. Corros. J., 1974, vol. 9, in press.
2. S. L. Cundy, A. J. F. Metherell, M. J. Whelan, P. N. T. Unwin, and R. B. Nicholson:Proc. Roy. Soc, 1968, vol. 307, A, p. 267.
3. C. R. Shastry and G. Judd:Met. Trans., 1972, vol. 3, p. 779.
4. D. E. Ward and G. W. Lorimer:1973 Proceedings of the Third International Conference on the Strength of Metals and Alloys. Cambridge, England. Institute of Metals 36, vol. 1, p. 488.
5. J. W. Edington and G. Hibbert:J. of Microsc, 1973, vol. 99, p. 125.