RT Article T1 Evaluating a school-based gang prevention: A theoretical perspective JF Evaluation review VO 10 SP 181 OP 203 A1 Winfree, L. Thomas A1 Osgood, D. Wayne A1 Esbensen, Finn-Aage 1951- A2 Osgood, D. Wayne A2 Esbensen, Finn-Aage 1951- LA English YR 1996 UL https://krimdok.uni-tuebingen.de/Record/1912542498 DO 10.1177/0193841X9602000204