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1991ApJ...378..537E - Astrophys. J., 378, 537-542 (1991/September-1)
Persistence and change in the soft X-ray spectrum of the quasar PG 1211+143.
ELVIS M., GIOMMI P., WILKES B.J. and McDOWELL J.
Abstract (from CDS):
Abstract Copyright: ∼
Journal keyword(s): Quasars - X-Rays: Sources - X-Rays: Spectra
Simbad objects: 9
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