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Leningrad State University; Physics Institute, Lithuanian Academy of Sciences. Translated from Astrofizika, Vol. 23, No. 2, pp. 427–435, September–October, 1985.
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Bogdanovich, P.O., Nikitin, A.A., Rudzikas, Z.B. et al. Lines of carbon, nitrogen, and oxygen ions in the spectra of planetary nebulas. II. Intensities of the C II and N III recombination lines and abundances of the C III and N IV ions. Astrophysics 23, 616–621 (1985). https://doi.org/10.1007/BF01007392
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DOI: https://doi.org/10.1007/BF01007392