Literature cited
Yu. G. Shteinberg and E. Yu. Tyurn, Steklo i Keram., No. 3 (1971).
R. Royson, Inorganic Glass-Forming Systems (Russian translation], Mir (1970).
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Additional information
Translated from Steklo i Keramika, No. 12, pp. 25–27, December, 1973.