Sija J, Mazunga M. Assessment of Viability of Coal Mines in Tanzania for Extraction of Rare Earth Elements. Tanz. J. Sci. [Internet]. 2023 Oct. 27 [cited 2024 Oct. 22];49(4):819-30. Available from: http://tjs.udsm.ac.tz/index.php/tjs/article/view/1571