Mapani, B., Finkelman, R. and Ravengai, S. (2014) “Trace and heavy element distribution of the Hwange Coals in Zimbabwe”, International Science and Technology Journal of Namibia, pp. 089–105. Available at: https://journals.unam.edu.na/index.php/ISTJN/article/view/1115 (Accessed: 6 May 2024).