Sandqvist, Aa. Ed. Ray, T P. Ed.
Central activity in galaxies from observational data to astrophysical diagnostics - Berlin Springer-Verlag 1993 - 235 - Lecture notes in physics ; 00413 .
3540563717
53 LNP
Central activity in galaxies from observational data to astrophysical diagnostics - Berlin Springer-Verlag 1993 - 235 - Lecture notes in physics ; 00413 .
3540563717
53 LNP