References
- Hutton W. E. A test for the purity of powdered enamel. J. Dent. Res. 1953; 32: 626–7
- Manly R. S., Hodge H. C. Density and refractive index studies of dental hard tissues. I. Methods for separation and determination of purity. J. Dent. Res. 1939; 18: 133–41