Muller, Jacques; Burger, A.F.; Van de Ven, M.F.C.; Jenkins, K.J.; Southern African Transport Conference (20th : 2001 : Pretoria, South Africa)(SATC, 2001-07)
Paper presented at the 20th Annual South African Transport Conference 16 - 20 July 2001 "Meeting the transport challenges in Southern Africa", CSIR International Convention Centre, Pretoria, South Africa.