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  1. Potomac River - Wikipedia

  2. Potomac, Maryland - Wikipedia

  3. Potomac River | Maryland, Virginia, Washington DC, & Map

  4. A Guide to the Potomac River - Washingtonian

  5. Potomac River - American Rivers

  6. Potomac River - WorldAtlas

  7. Potomac Basin Facts - ICPRB

  8. RiverExplorer - Potomac River Guide

  9. Potomac Conservancy

  10. 101 River Facts — Potomac Conservancy