Isa Osu, U., Edith Bolanle, A., & Hadiza, O. (2018). 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(2), 135-139. https://doi.org/10.14419/ijac.v6i2.10630