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Translated from Steklo i Keramika, Vol. 31, No. 4, p. 34, April, 1974.
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Pankov, V.I. The road to technical progress. Glass Ceram 31, 287–288 (1974). https://doi.org/10.1007/BF00677558
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DOI: https://doi.org/10.1007/BF00677558