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1987IAUS..121..169P - 121st Symposium of the IAU held in Byurakan, Armenia, USSR, June 3-7, 1986 Ed. by Khachikian E.Y., Fricke K.J., Melnick J., 121, 169-184 (1987)
Emission lines variations in the spectra of Seyfert galaxies nuclei. Observational data.
PRONIK I.
Journal keyword(s):
Simbad objects: 12
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