Nwajei, G E, and J U Oruvwuje. 2001. “ASSESSMENT OF HEAVY METALS IN. CLARINS BUTHOPOGON (FISH) PARTS AND NYMPHAEA LOTUS (AQUATIC PLANT) IN RIVER NIGER, DELTA STATE OF NIGERIA”. Biological Sciences - PJSIR 44 (6):333-37. https://v2.pjsir.org/index.php/biological-sciences/article/view/1967.