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1981ApJ...243L...5C - Astrophys. J., 243, L5-L8 (1981)
Optical identification of serendipitous Einstein sources: 19 X-ray-selected active galactic nuclei.
CHANAN G.A., MARGON B. and DOWNES R.A.
Journal keyword(s):
Nomenclature: Table 1: [CMD81] HHMM+DDd N=19
Simbad objects: 19
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