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1990SoSAO..64..104S - Soobshch. Spets. Astrof. Obs., 64, 104 (1990)
Electrophotometry of double quasar Q 0957+56A,B.
SHVARTSMAN V.F., BESKIN G.M. and NEIZVESTNY S.I.
Journal keyword(s):
Simbad objects: 2
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