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1990AJ.....99.1421B - Astron. J., 99, 1421-1434 (1990)
Optical variability of extragalactic objects used to tie the HIPPARCOS reference frame to an extragalactic system using HUBBLE SPACE TELESCOPE observations.
BOZYAN E.P., HEMENWAY P.D. and ARGUE A.N.
Journal keyword(s):
CDS comments: In table I QSO 0716-714 misprint for QSO 0716+714
Simbad objects: 89
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