RT Article T1 Initiation of drug selling and its relationship with illicit drug use and serious delinquency in adolescent boys A1 van Kammen, Welmoet A1 Loeber, Rolf 1942-2017 A1 Maguin, Eugene A2 Loeber, Rolf 1942-2017 A2 Maguin, Eugene LA English PB Kluwer Academic Publishers YR 1993 UL https://krimdok.uni-tuebingen.de/Record/1912592045