Subject(s): Youth -- Substance use -- United States | Young adults -- Drug use -- United States | Academic achievement -- Social aspects -- United States | Problem Youth -- Education -- United States
Contents:Introduction and overview -- Literature review: conceptual and empirical overview of issues -- Survey methods and analysis strategie
Subject(s): Rivers | Valley ecology | Stream ecology
Contents:
1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. Introduction -- Natural river and its destruction -- Natural riverscape and its modification -- Resources I. Water resources and their loss -- Development and variation of rivers -- Development and variation of riverscapes