• Front Matter R1-R12

• Executive Summary 1-8

• 1 Illicit Drug Use in the United States 9-44

• 2 Concepts of Prevention 45-75

• 3 Evaluating Prevention Program Effects 76-118

• Appendix: Community Settings and Channels for Prevention 119-154

• Index 155-162

" 2 Concepts of Prevention ." Preventing Drug Abuse: What Do We Know? . Washington, DC: The National Academies Press, 1993 .

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