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Additional information
Institute of Radiophysics and Electronics, Academy of Sciences of the Ukrainian SSR. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 18, No. 6, pp. 901–905, June, 1975.
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Eru, I.I., Myshenko, V.V. & Peskovatskii, S.A. Optimal concentration of Fe3+ ions in andalusite for a “warm” paramagnetic amplifier. Radiophys Quantum Electron 18, 667–670 (1975). https://doi.org/10.1007/BF01036967
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DOI: https://doi.org/10.1007/BF01036967