RT Article T1 Meta-analysis of 143 adolescent drug prevention programs: quantitative outcome results of program participants compared to a control or comparison group JF Journal of drug issues VO 16 IS 4 SP 537 OP 567 A1 Tobler, Nancy S. LA English YR 1986 UL https://krimdok.uni-tuebingen.de/Record/1636914837 K1 Drogenpräventionsprogramme K1 Jugendliche K1 Gleichaltrigengruppe K1 Drogenabhängigkeit