Y.E G, O.O A, O.O O-O, Y.V A. Petrological, Chemical, and Mineralogical Characterization of Anka (Zamfara State) Manganese Ore. NanoNEXT [Internet]. 2021 Mar. 30 [cited 2026 Apr. 29];2(1):7-12. Available from: https://journals.asianresassoc.org/index.php/nanonext/article/view/77