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  1. Polychlorinated biphenyl - Wikipedia

  2. Learn about Polychlorinated Biphenyls | US EPA - U.S.

  3. Fact Sheet for Preventing and Detecting PCB Contamination in Used Oil

  4. What Are Adverse Health Effects of PCB Exposure?

  5. Polychlorinated Biphenyls (PCBs) - US EPA

  6. Public Health Statement for PCBs - Centers for Disease Control …

  7. What are PCBs? - NOAA's National Ocean Service

  8. Polychlorinated biphenyls (PCBs) | EHS - University of Washington

  9. What Are Polychlorinated Biphenyls (PCBs)? - Agency for Toxic ...