RT Article T1 Retaliatory attitudes as mediator of exposure to violence and firearm aggression among youth: The protective role of organized activity involvement JF Developmental psychology VO 58 IS 5 SP 990 OP 1002 A1 Lee, Daniel B. 1966- A2 Zimmerman, Marc A. A2 Walton, Maureen A. A2 Cunningham, Rebecca M. A2 Carter, Patrick M. A2 Heinze, Justin A2 Schmidt, Carissa J. LA English YR 2022 UL https://krimdok.uni-tuebingen.de/Record/1912688905 DO 10.1037/dev0001339