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Translated from Steklo i Keramika, No. 6, pp. 5–6, June, 1973.
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Smirnov, V.S., Shishkov, E.N. & Kuznetsova, O.D. Extending the variety of goods. Glass Ceram 30, 365–366 (1973). https://doi.org/10.1007/BF00673881
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DOI: https://doi.org/10.1007/BF00673881