TY  - BOOK
AU  - Ravera, S.
AU  - De Gier, J.J.
TI  - Prevalence of psychoactive substances in the general population [PDF]
PY  - 2008///
CY  - Groningen
PB  - Universiteit van Groningen
KW  - drugs
KW  - epidemiologie
KW  - onderzoeksrapporten
KW  - Europese Unie
UR  - http://www.google.com/search?q=Prevalence-of-psychoactive-substances-in-the-general-population druid
ER  -