RT Article T1 A multi-city study of drug misuse in Europe JF Bulletin on narcotics VO 41 IS 1/2 SP 3 OP 27 A2 Hartnoll, Richard LA English YR 1989 UL https://krimdok.uni-tuebingen.de/Record/1632552973 K1 Drogenkonsum K1 Prävalenzstudien K1 Epidemiologie