TY  - RPRT
TI  - On the relationship between optically selected and X-ray-selected active galactic nuclei
AU  - Franceschini, A.
AU  - Gioia, I. M.
AU  - Maccacaro, T.
PY  - 1986
UR  - https://ntrs.nasa.gov/citations/19860044780
ID  - 19860044780
ER  -