Nwajei GE. HEAVY METAL CONCENTRATION IN MARINE SEDIMENTS AND VEGETATION ( CALTHA PALUSTRVIS ) FROM RIVER RAMOS IN BAYELSA AND DELTA STATES OF NIGERIA. Pakistan Journal of Scientific & Industrial Research [Internet]. 2002 Apr. 22 [cited 2024 Nov. 24];45(2):111-3. Available from: https://v2.pjsir.org/index.php/biological-sciences/article/view/1765