Pienaar, W. “Operational and Tegnological Requirements for the Profitable Provision of Rail Freight Transport”. Suid-Afrikaans Tydskrif Vir Natuurwetenskap En Tegnologie / <i>South African Journal of Science and Technology</I&gt;, Vol. 36, no. 1, Nov. 2017, p. 11 bladsye, doi:10.4102/satnt.v36i1.1482.