RT Article T1 Crack dealers and restrictive deterrence: identifying narcs JF Criminology VO 34 IS 3 SP 409 OP 431 A1 Jacobs, Bruce A. LA English YR 1996 UL https://krimdok.uni-tuebingen.de/Record/1639289003 K1 Crack K1 Generalprävention K1 Polizeikontrolle K1 Crackdealer K1 Arbeitsstil K1 Spezialprävention