Michael, P.S. 2019. Phytoremediation of Heavy Metals by Water Hyacinth in Sewage Wastewater Stabilization Ponds Under Humid Lowland Tropical Climatic Conditions. International Journal of Environment. 8, 1 (Mar. 2019), 30–42. DOI:https://doi.org/10.3126/ije.v8i1.23091.