1. R. ROY,J. Amer. Ceram. Soc. 39 (1956) 145.
2. Idem, ibid.52 (1969) 344.
3. M. A. LEITHEISER and H. G. SOWMAN, Non-Fused Alumina Oxide-Based Abrasive Mineral, United States Patent 4314 827 (1982).
4. R. A. ROY and R. ROY, New Metal-Ceramic Hybrid Xerogels, Abstracts, Materials Research Society Annual Meeting, Boston, MA (1982) p. 377.
5. R. ROY and R. A. ROY,Mater. Res. Bull. in press.