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- [3] OPTICAL AND X-RAY-PROPERTIES OF X-RAY SELECTED ACTIVE GALACTIC NUCLEI ASTROPHYSICAL JOURNAL, 1982, 261 (01): : 51 - &
- [5] X-RAY-PROPERTIES OF NORMAL GALAXIES BULLETIN OF THE AMERICAN PHYSICAL SOCIETY, 1979, 24 (04): : 640 - 640