1. R. W. Hertzberg, F. D. Lemkey, and J. A. Ford, Trans. Met. Soc. AIME 233 (1965) 342.
2. F. R. Mollard and M. C. Flemings, ibid 239 (1967) 1534.
3. H. E. Cline, ibid 239 (1967) 1489.
4. P. Sheppard, Ph.D. Thesis, University of Toronto, 1969.
5. H. E. Cline and J. D. Livingstone, Trans. Met. Soc. AIME 245 (1969) 1987.