Obaje, S.O., Ogunyele, A.C., Adeola, A.O. and Akingboye, A.S. 2019. Assessment of stream sediments pollution by potentially toxic elements in the active mining area of Okpella, Edo State, Nigeria. Rudarsko-geološko-naftni zbornik. 34, 2 (Jan. 2019). DOI:https://doi.org/10.17794/rgn.2019.2.5.