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1978Natur.273..450A - Nature, 273, 450-452 (1978)
4U 0241+61 : a luminous low-redshift QSO.
APPARAO K.M.V., BIGNAMI G.F., MARASCHI L., HELMKEN H., MARGON B., HJELLMING R., BRADT H.V. and DOWER R.G.
Journal keyword(s):
Simbad objects: 4
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