Mandevhu, S.M, A. Vatuva, and S. Kahovera. “Distribution and Occurrence of Lithium-Bearing Minerals in the Helikon Pegmatites in Karibib, Namibia.”. Namibian Journal for Research, Science and Technology 2, no. 1 (December 11, 2020): 90-100. Accessed September 24, 2022. http://icenter.ncrst.na/index.php/njrst/article/view/22.