TY - GEN AU - Diemel, Steven AU - Blanken, Peter TI - The feasibility of data sources for the detection, tracking and understanding of changes in drug consumption patterns in the Netherlands T2 - IVO-reeks SN - 9074234232 PY - 1999/// CY - Rotterdam PB - IVO KW - drugs KW - epidemiologie KW - haalbaarheidsonderzoek KW - Nederland KW - onderzoek KW - onderzoeksmethoden ER -