RT Article T1 Ethnic identity as a moderator of psychosocial risk and adolescent alcohol and marijuana use: Concurrent and longitudinal analyses JF Journal of child & adolescent substance abuse VO 6 IS 1 SP 21 OP 47 A2 Scheier, Lawrence M. A2 Botvin, Gilbert J. A2 Diaz, Tracy A2 Ifill-Williams, Michelle LA English YR 1997 UL https://krimdok.uni-tuebingen.de/Record/1639917519 K1 Jugendliche K1 Alkoholkonsum K1 Marihuanakonsum