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\bibitem{Krief_etal1994} Krief, J. - P., Szalat, A., \& Le Gall-Viliker, S. (1994). \textit{Toxicomanie : proscrire ou pr{\'e}scrire; San Patrignano : le village des toxicos}  (A. Gu{\'e}rin, Ed.). La Sept ARTE; KS Visions.

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