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- A1 Zimmerman, Marc A. A1 Walton, Maureen A. A1 Cunningham, Rebecca M. A1 Carter, Patrick M. A1 Heinze, Justin A1 Schmidt, Carissa J. 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