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\bibitem{FernandezGomez+Pozas1997} Fern{\'a}ndez G{\'o}mez, C., \& Pozas, J. M. (1997). \textit{Questionnaire on quality indicators and criteria at therapeutic communities : nature and instructions for use}. Li{\`e}ge: Federation of european professional working in the field of drug abuse (ERIT), Group of european experts on quality indicators and criteria in therapeutic communities for drug abusers.

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