By Smit Filip   de Zwart Wil   Spruit Inge   Monshouwer Karin   van Ameijden Erik   in Drugs: Education, Prevention & Policy

ISSN:1465-3370|9|3|267-274

Informa Healthcare‎(2002)‎

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By Monshouwer Karin   Smit Filip   de Zwart Wil   Spruit Inge   van Ameijden Erik   in Journal of Substance Use

ISSN:1465-9891|8|3|155-163

Radcliffe Press‎(2003)‎

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