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\bibitem{Roques1998} Roques, B. (1998). \textit{Probl{\`e}mes pos{\'e}s par la dangerosit{\'e} des {\textquotedblleft}drogues{\textquotedblright}. Rapport au Secr{\'e}taire d{\textquoteright}Etat {\`a} la Sant{\'e}}. Paris.

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