RT Article T1 Risk factors in school shootings JF Clinical psychology review VO 20 IS 1 SP 3 OP 56 A1 Verlinden, S. A1 Hersen, M. A1 Thomas, J. LA Undetermined YR 2000 UL https://krimdok.uni-tuebingen.de/Record/1639669132 K1 Gewalt K1 Schule K1 Schusswaffen