00000nam a2200000 a 4500 O'Malley, Patrick M. Johnston, Loyd D. Bachmann, Jerald G. Jugend USA Zahlen & Fakten Jugendforschung Studie The Monitoring the Future Projekt After Twenty-Seven Years Design and Procedures 2001 Monitoring the Future Occasional Paper 54 S. 1. Auflage W:\Digitale Publikationen\Sucht\Suall\Monitoring the Future 2003\00446101_Monitoring_theFutureProject27Years.pdf University of Michigan, Social Research 58 S.