Pheiffer, W., R. Pieters, H. Bouwman, and C. Mor. “Potentially Problematic Elements in Sediment and Fish from the Orange-Vaal River System”. Suid-Afrikaans Tydskrif vir Natuurwetenskap en Tegnologie / <i>South African Journal of Science and Technology</i&gt; 33, no. 1 (October 10, 2014): 2 bladsye. Accessed December 22, 2024. http://satnt.co.za/index.php/satnt/article/view/539.