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\bibitem{Krucker+Wicki1996} Krucker, S., \& Wicki, W. (1996). \textit{Evaluation des Projektes {\textquotedblleft}Suchtpr{\"a}vention in Kinder- und Jugendheimen{\textquotedblright} : ({\textquotedblleft}le fil rouge{\textquotedblright}) : Schlussbericht}. Bern: Universit{\"a}t Bern, Institut f{\"u}r Psychologie.

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