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Quantitative and qualitative changes in cocaine use among American high school seniors, college students, and young adults

O’Malley, Patrick M; Johnston, Lloyd D; Bachman, Jerald G. (1991). Quantitative and qualitative changes in cocaine use among American high school seniors, college students, and young adults. In Schober, Susan, Schade, Charles (Ed.), The Epidemiology of cocaine use and abuse.