Nwajei, G. E., and J. U. Oruvwuje. “ASSESSMENT OF HEAVY METALS IN. CLARINS BUTHOPOGON (FISH) PARTS AND NYMPHAEA LOTUS (AQUATIC PLANT) IN RIVER NIGER, DELTA STATE OF NIGERIA”. Biological Sciences - PJSIR, vol. 44, no. 6, Dec. 2001, pp. 333-7, https://v2.pjsir.org/index.php/biological-sciences/article/view/1967.