RT Article T1 Quantitative and qualitative changes in cocaine use among American high school seniors, college students, and young adults JF Substance use & misuse VO 32 IS 12/13 SP 1727 OP 1732 A1 Omalley, Patrick M. A1 Johnston, Lloyd D. A1 Bachman, Jerald G. 1936- LA English YR 1997 UL https://krimdok.uni-tuebingen.de/Record/1639873503 K1 USA K1 Kokainkonsum