Evaluation : a key tool for improving drug prevention : papers from the second European conference on the evaluation of drug prevention, "Evaluation: a key for improving drug prevention", held in Strasbourg, France, from 2 to 4 December 1999 /
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a key tool for improving drug prevention : papers from the second European conference on the evaluation of drug prevention, "Evaluation: a key for improving drug prevention", held in Strasbourg, France, from 2 to 4 December 1999 /