∗Discovery of four new X-ray selected quasars and two new...

∗Discovery of four new X-ray selected quasars and two new Seyfert galaxies from ROSAT sources : ZHAO Yong-heng, SHI Jian-rong & ZHAO Gang Beijing Astronomical Observatory, CAS, Beijing 100012

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Volume:
24
Year:
2000
Language:
english
DOI:
10.1016/s0275-1062(00)90188-7
File:
PDF, 53 KB
english, 2000
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