Kirjat - Selaus tekijän mukaan "Bjarnason, Thoruddur"
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The ESPAD Report 2003
Hibell, Björn; Andersson, Barbro; Bjarnason, Thoruddur; Ahlström, Salme; Balakireva, Olga; Kokkevi, Anna; Morgan, Mark (The Swedish Council for Information on Alcohol and Other Drugs (CAN), Council of Europe, Co-operation Group to Combat Drug Abuse and Illicit Trafficking in Drugs (Pompidou Group), 2004)