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    Mehrdimensionale Klassifikation des Drogenkonsums bei Jugendlichen

    The incidence of drug taking was established in a partly anonymous investigation on 6315 19-year old test subjects from the canton of Zurich. 1570 subjects (24.9%) in the group investigated showed drug contact...

    Ursula Müller, René Ruppen, Urs Baumann… in Archiv für Psychiatrie und Nervenkrankheit… (1972)