References
- Lyle, A. K., Jour. Soc. Glass Tech., 41, 220T–228T (1957).
- Lightfoot, C. A. and Thomson, G. H., Glass Technology, 5 (5), 189–194 (1964).
- Turner W. E. S. and Weyl, W., Jour. Soc. Glass Tech., 19, 208–216‘(1935).
- Lawton, A., Holland, A. J. and Turner, W. E. S., Jour. Soc. Glass Tech., 24 (102), 73.
- Weyl, W. A., Coloured Glasses, (116–118), Dawson's of Pall Mall, London (1959).
- Ibid. Page 101.
- Holscher, H. H., Rough, R. R. and Plummer J. H., Jour. Amer. Ceram. Soc., 26 (12), 398, (1943).
- Tooley, F. V., Handbook of Glass Manufacture, Vol. I, p. 288. Ogden Publishing Co., New York (1961).