RT Article T1 Psychological versus sociological explanations for delinquent conduct and gang formation JF Journal of contemporary criminal justice VO 9 IS 2 SP 81 OP 93 A1 Davis, James LA English YR 1993 UL https://krimdok.uni-tuebingen.de/Record/1640269622 K1 Jugenddelinquenz K1 Jugendbanden DO 10.1177/104398629300900202