1. Holt, P. F., Pneumoconiosis (Edward Arnold, Publishers, Ltd., London, 1957).
2. McGregor, R. R., Silicones in Medicine and Surgery (distributed by Dow Corning Corporation, 1957).
3. Eaborn, C., Organosilicon Compounds, 473 (Butterworths Scientific Publications, London, 1960).
4. Rochow, E. G., An Introduction to the Chemistry of the Silicones, 1 (John Wiley and Sons, Inc., New York, 1951).
5. Speier, J. L., J. Amer. Chem. Soc., 74, 1003 (1952). Speier, Dow Corning Corporation, Midland, Michigan, who synthesized dimethyldi-(4-hydroxyphenyl)-silane, kindly supplied a sample.