TY - GEN ED - European Monitoring Centre for Drugs and Drug Addiction [EMCDDA] TI - Guidelines for collecting data on retail drug prices in Europe : issues and challenges T2 - EMCDDA manuals SN - 9789291684137 PY - 2010/// CY - Lisbon PB - EMCDDA KW - dealers KW - drugs KW - Europese Unie KW - handel KW - onderzoek KW - onderzoeksmethoden KW - prijzen KW - richtlijnen ER -