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  1. Crack cocaine - Wikipedia

  2. Crack Cocaine Addiction Signs, Effects, & Treatment | DrugAbuse.com

  3. Crack epidemic | US History, Causes & Effects | Britannica

  4. Crack vs Cocaine: What's The Difference Between Crack & Cocaine?

  5. Cocaine (Crack): What It Is, Side Effects, Risks & Withdrawal

  6. Crack Addiction: Definition, Symptoms, Causes, and Treatment

  7. What is Crack? | What You Need to Know About Crack - Infinite …

  8. Crack Cocaine Fast Facts - United States Department of Justice

  9. Crack Addiction: Symptoms, Treatment, and Recovery

  10. Crack Addiction: Symptoms & Treatment