RT Article T1 Weekly marijuana use as a risk factor for initial cocaine use: Results from a six-wave national survey JF Journal of child & adolescent substance abuse VO 5 IS 4 SP 55 OP 78 A1 Miller, T. Q. A1 Volk, R. J. LA English YR 1996 UL https://krimdok.uni-tuebingen.de/Record/1639945652 K1 Jugendliche K1 USA K1 Marihuanakonsum