RT Article T1 Evidence for significant polydrug use among ecstasy-using college students JF Journal of American college health VO 55 IS 2 SP 99 OP 104 A1 Wish, Eric D. A1 Arria, Amelia M. A1 Hsu, Margaret H. A1 O'Grady, Kevin E. A1 Fitzelle, Dawn Bonanno A2 Arria, Amelia M. A2 Hsu, Margaret H. A2 O'Grady, Kevin E. A2 Fitzelle, Dawn Bonanno LA English YR 2006 UL https://krimdok.uni-tuebingen.de/Record/1912544326 DO 10.3200/JACH.55.2.99-104