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  1. Great Lakes Basin - Wikipedia

  2. Great Lakes - Wikipedia

  3. Great Lakes | Names, Map, & Facts | Britannica

  4. Great Lakes Facts and Figures | US EPA - U.S. Environmental …

  5. Map of the Great Lakes - Geology.com

  6. All About the Great Lakes of North America - ThoughtCo

  7. Great Lakes Facts and Figures | The Great Lakes - US EPA

  8. The Great Lakes - WorldAtlas

  9. Great Lakes Science Center | U.S. Geological Survey - USGS.gov

  10. Great Lakes - Lakes, Ecosystems, Biodiversity | Britannica