RT Article T1 Drug trafficking networks in Europe JF European journal on criminal policy and research VO 1 IS 2 SP 96 OP 104 A1 van Doorn, Jan LA English YR 1993 UL https://krimdok.uni-tuebingen.de/Record/1640356479 K1 Drogenhandel K1 Europa K1 International DO 10.1007/BF02249231