Isa Osu, Usman, Agbaji Edith Bolanle, and Omenesa Hadiza. “Heavy Metals Assessment of Soils in and Around Kama-Otto and Kwotto Artisanal Mining of Mica, Cassiterite and Tantalite in Nasarawa State, Nigeria”. International Journal of Advanced Chemistry 6, no. 2 (July 23, 2018): 135–139. Accessed April 30, 2024. https://sciencepubco.com/index.php/IJAC/article/view/10630.