RT Article T1 Illegal dealings: the impact of low-level police enforcement on drug markets JF European journal on criminal policy and research VO 9 IS 2 SP 137 OP 162 A1 May, Tiggey A2 Hough, Michael LA English YR 2001 UL https://krimdok.uni-tuebingen.de/Record/1639634401 K1 Polizeiintervention K1 Drogenmarkt K1 Verdeckte Ermittlung K1 Drogenhandel