Literature Cited
É. E. Khachikyan, Astrofizika,9, 157 (1973).
Additional information
Hale Observatories, Carnegie Institute, Washington. California Institute of Technology, USA. Byurakan Astrophysical Observatory. Translated from Astrofizika, Vol. 10, No. 2, pp. 298–300, April–June, 1974.
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Arp, C.H., Sargent, W.L.W., Khachkiyan, É.E. et al. Spectrum of the blue object near the irregular galaxy NGC 520. Astrophysics 10, 179–180 (1974). https://doi.org/10.1007/BF01006141
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DOI: https://doi.org/10.1007/BF01006141