RT Article T1 A Dutch View of the German Shell Report Jugend 9̐7 JF Diskurs VO 7 SP 58 OP 61 A1 Vollebergh, Wilma A. M. LA Undetermined YR 1997 UL https://krimdok.uni-tuebingen.de/Record/1662284381 K1 Shell-Studie K1 Meta-Analyse K1 Jugendbefragung K1 Metaanalyse