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Additional information
Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 17, No. 3, pp. 484–490, September, 1972.
We are indebted to A. G. Vlasov for advice on this work.
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Vorob'ev, B.S., Kuznetsov, A.I. A double-modulation method in an optical-zero system for long-wave spectrophotometers. J Appl Spectrosc 17, 1189–1193 (1972). https://doi.org/10.1007/BF00607774
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DOI: https://doi.org/10.1007/BF00607774