RT Article T1 Day-care treatment for youth multiple drug abuse: a six-year follow-up study JF Journal of psychoactive drugs VO 20 IS 4 SP 385 OP 396 A1 Feigelman, William A2 Hyman, Merton M. A2 Amann, Kenneth LA English YR 1989 UL https://krimdok.uni-tuebingen.de/Record/1635756766 K1 Drogentherapie K1 Jugendliche K1 Verlaufsstudien