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1987MNRAS.227..525A - Mon. Not. R. Astron. Soc., 227, 525-534 (1987)
X-ray intensity and spectral variations in the BL Lac sources H 2155-304 and PKS 0548-322.
AGRAWAL P.C., SINGH K.P. and RIEGLER G.R.
Journal keyword(s):
Simbad objects: 2
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