RT Article T1 Youth violence and exposure to violence in childhood: An ecological review JF Aggression and violent behavior VO 3 IS 2 SP 159 OP 179 A1 Jonsonreid, M. LA English YR 1998 UL https://krimdok.uni-tuebingen.de/Record/1639821465 K1 Jugendliche K1 Gewalt K1 Ursachen