1. S. D. Stookey, Paper Presented to Symposium on Nucleation and Crystallization in Glasses and Melts, Amer. Soc (1962).
2. P. W. McMillan, ?Glass-Ceramics? (Academic Press, New York, 1964).
3. A. R. West andF. P. Glasser,J. Mater. Sci. 5 (1970) 557.
4. Idem, ibid 5 (1970) 676.
5. P. F. James andP. W. McMillan,Phys. Chem. Glasses 11 (1970) 53.