TY  - GEN
AU  - Gfroerer, Joseph C.
AU  - Wu, Li-Tzy
AU  - Penne, Michael A.
TI  - Initiation of marijuana use : trends, patterns and implications [PDF]
PY  - 2002///
CY  - Rockville
PB  - SAMHSA
KW  - cannabis
KW  - drugs
KW  - epidemiologie
KW  - jongeren
KW  - onderzoeksrapporten
KW  - VS
UR  - http://www.google.com/search?q=Initiation-of-marijuana-use-trends-patterns-and-implications
ER  -