H. J. van Niekerk

From Correspondence to Online Provisioning in Open and Distance Learning: Greening Implications versus Practical and Organisational Imperatives

Rudi W. Pretorius, R. Coetzee, A. E. de Jager, 2015 .

Causes and consequences of the Merriespruit and other tailings‐dam failures

H. J. van Niekerk, M. J. Viljoen, M. Viljoen, 2005 .