Notes
* Discussion at a meeting of the Powder Metallurgy Joint Group, held in Eastbourne on 19 November 1973.
† Papers by M. Strömgren, H. Åström, and K. E. Easterling, (Powder Met., 1973, 16, (32), 155); J. A. Rogers, D. E. Miles, and B. E. Hopkins, (ibid., p. 166); M. R. James and J. R. Moon (ibid., p. 186). Summary by Mr. V. A. Tracey.