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Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 35, No. 4, pp. 732–736, October, 1981.
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Livshits, V.Y., Karapetyan, G.O. & Kozyrev, V.K. Ion-exchange synthesis of a silicogermanate gradient glass. J Appl Spectrosc 35, 1173–1176 (1981). https://doi.org/10.1007/BF00605672
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DOI: https://doi.org/10.1007/BF00605672