Choice Reviews Online · 1989 · 2.1K citations · 0 references
Natural SciencesAstronomyPhysicsAstrophysicsInterstellar MediumNuclear PhysicsAstrophysical PlasmasGalactic NucleiInterstellar GasStellar AtmospheresStellar EvolutionStellar StructureActive Galactic Nuclei ContributionActive Galactic Nuclei Ultraviolet EmissionActive Galactic Nuclei VariabilityActive Galactic Nucleus ContributionUnified Model Of Active Galactic Nuclei