Al-khafaji, Basim Y., and Afrah A. Maktoof Al-Awady. 2014. “Concentration and Accumulation of Some Trace Elements in Water, Sediment and Two Species of Aquatic Plants Collected from the Main Outfall Drain, Near the Center of Al-Nassiriyia City Iraq”. Journal of Biotechnology Research Center 8 (2):19-27. https://doi.org/10.24126/jobrc.2014.8.2.321.