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Translated from Steklo i Keramika, No. 12, pp. 2–4, December, 1973.
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Zaliznyak, D.V., Mel'nik, É.P. & Firer, M.Y. To Greet the 40th anniversary. Glass Ceram 30, 803–807 (1973). https://doi.org/10.1007/BF00677097
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DOI: https://doi.org/10.1007/BF00677097