RT Article T1 Family Structure and Aggressive Behavior in a Population of Urban Elementary School Children JF Journal of the American Academy of Child and Adolescent Psychiatry VO 33 IS 4 SP 540 OP 548 A2 Hunter, A. G. A2 Kellam, S. G. A2 Ialongo, N. LA English YR 1994 UL https://krimdok.uni-tuebingen.de/Record/1640308253 K1 Kinder K1 Aggressivität