Blyler , Karen, and Joy Jordan. “Aquatic and Marine Ecosystems—Lesson 4: Coastal Ecosystems—Beach, Estuary, Marsh & Swamp: 4H350 4H350, Rev. 11 2014”. EDIS, vol. 2014, no. 8, Oct. 2014, doi:10.32473/edis-4h350-2014.