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Translated from Izmeritel'naya Tekhnika, No. 3, pp. 78–79, March, 1971.
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Dudich, I.I. Public Scientific-Research Institute of Instrumentation and Metrology. Meas Tech 14, 482–484 (1971). https://doi.org/10.1007/BF00980301
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DOI: https://doi.org/10.1007/BF00980301