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European Union. European Monitoring Centre for Drugs and Drug Addiction a Baker, Oswin, ed. et al. Evaluating drug prevention in the European Union: papers arising from the First European Conference on the Evaluation of Drug Prevention, held in Lisbon, Portugal, 12-14 March 1997. Luxembourg: Office for Official Publications of the European Communities, 1998. 143 s. EMCDDA scientific monograph series; no. 2. ISBN 92-9168-050-8.

Baker, O. (1998). Evaluating drug prevention in the European Union: Papers arising from the First European Conference on the Evaluation of Drug Prevention, held in Lisbon, Portugal, 12-14 March 1997. Luxembourg: Office for Official Publications of the European Communities.

Baker, Oswin. Evaluating Drug Prevention in the European Union: Papers Arising From the First European Conference On the Evaluation of Drug Prevention, Held in Lisbon, Portugal, 12-14 March 1997. Luxembourg: Office for Official Publications of the European Communities, 1998.

Baker, Oswin. Evaluating Drug Prevention in the European Union: Papers Arising From the First European Conference On the Evaluation of Drug Prevention, Held in Lisbon, Portugal, 12-14 March 1997. Luxembourg: Office for Official Publications of the European Communities, 1998.