Karthik, M. and Nagendran, R. 2002. Nutrient Reduction and Productivity Studies in Low Strength Freshwater Aquaculture Wastewater Using Lemna Gibba (Duckweed) System. Environment Conservation Journal. 3, 1 (Mar. 2002), 1–8. DOI:https://doi.org/10.36953/ECJ.2002.030101.