ESO Workshop on Extranuclear Activity in Galaxies: Garching, F.R. Germany, 16-18 May 1989 ; followed by an informal session on Cen A, 19 May 1989 ; proceedings - Meurs, Evert J.; Meurs, E.J.A.; Fosbury, R.A.E. (ESO conference and workshop proceedings, 1989)