Nkambule NP, Blignaut JN. The external costs of coal mining: the case of collieries supplying Kusile power station. J. energy South. Afr. [Internet]. 2012 Nov. 1 [cited 2024 Jul. 19];23(4):85-93. Available from: https://journals.assaf.org.za/index.php/jesa/article/view/3181