RT Article T1 A quasi-experimental analysis of schoolwide violence prevention programs JF Journal of school violence VO 16 IS 1 SP 49 OP 67 A1 Barnes, Tia N. A2 Smith, Stephen W. A2 Leite, Walter LA English YR 2017 UL https://krimdok.uni-tuebingen.de/Record/1912672014 DO 10.1080/15388220.2015.1112806