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Samaila A, Bello S, Iliyasu SR, Sani M. THE BACKGROUND CONCENTRATION OF SOME HEAVY METALS AT NYSC ORIENTATION CAMP LAYOUT, KATSINA. FJS [Internet]. 2022Aug.23 [cited 2022Dec.9];6(4):150 -155. Available from: https://fjs.fudutsinma.edu.ng/index.php/fjs/article/view/1051