Naicker, L., P. du Toit, M. Kleynhans, and E. Kruger. “Comparing Visual Skills in Sedentary and Active Work Environments”. Suid-Afrikaans Tydskrif vir Natuurwetenskap en Tegnologie / <i>South African Journal of Science and Technology</i&gt; 32, no. 1 (December 19, 2013): 1 page. Accessed April 27, 2024. http://satnt.ac.za/index.php/satnt/article/view/443.