Yawo O, Akpan I. Assessment of heavy metals concentration in sediments of Utibete River, Eastern Obolo, Southeastern Nigeria using particle induced X-ray emission (PIXE) technique. REJOST [Internet]. 2021 Dec. 1 [cited 2024 May 16];1(1):17-36. Available from: https://rejost.com.ng/index.php/home/article/view/4