871×762 Coosa, Tallapoosa, Chattahoochee, Flint, Suwannee, etc, in Watersheds of the Gulf of Mexico, Florida, Alabama, Georgia, by John S. Quarterman, for SpectraBusters.org, 19 December 2014,
EPA MyWaters Mapper http://watersgeo.epa.gov/mwm/
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