//-->
Riglyne vir die implementering van 'n eienaar-drywerstelsel
Spamer, J. S., (1998)
Forecasting the demand for South African rail goods transport
Walbeek, C. P. van, (1997)
Comparative economic efficiency, operating costs and fuel consumption rates of freight transport modes between the largest industrial cities and seaports in South Africa
Pienaar, W. J., (2013)