RT Article T1 Do school violence policies matter? An empirical analysis of four approaches to reduce school violence A1 Granberg-Rademacker, J.S. A1 Johnson, Avra A1 Bumgarner, Jeffrey A2 Johnson, Avra A2 Bumgarner, Jeffrey LA English YR 2007 UL https://krimdok.uni-tuebingen.de/Record/191252130X