TY  - GEN
AU  - Van Ours, Jan C.
AU  - Williams, Jenny
TI  - Why parents worry : initiation into cannabis use by youth and their educational attainment [PDF]
SN  - 9780734037237
PY  - 2007///
CY  - Melbourne
PB  - University of Melbourne
KW  - Australië
KW  - cannabis
KW  - drugs
KW  - etiologie
KW  - jongeren
KW  - onderwijs
KW  - onderzoeksrapporten
UR  - http://www.google.be/search?q=Why-parents-worry-initiation-into-cannabis-use-by-youth-and-their-educational-attainment
ER  -