1. J. H. WESTBROOK and P. J. JORGENSON,Trans. AIME 223 (1965) 425.
2. J. H. WESTBROOK, in “Environment-sensitive Mechanical Behaviour”, edited by A. R. C. Westwood and N. S. Stoloff (Gordon and Breach, New York, 1966) p. 247.
3. J. H. WESTBROOK, in “Surfaces and Interfaces”, Vol. II, edited by J. J. Burke, N. J. Reed and V. Weiss (Syracuse University Press, Syracuse, New York, 1968) p. 95.
4. J. H. WESTBROOK and P. J. JORGENSON,Am. Mineral. 53 (1968) 1899.
5. R. E. HANNEMAN and J. H. WESTBROOK,Philos. Mag. 18 (1968) 73.