Coertze, H.; Cloete, Jacobus Johannes Nicolaas; Bigalke, R. (Rudolph), 1896-; De Kock, W.J.; Ploeger, Jan; Rex, Hermann Moritz(Association Old Pretoria, 1958-12)
Van Buisbergen, Marilize(University of Pretoria. Faculty of Engineering, Built Environment and Information Technology. Dept. of Industrial and Systems Engineering, 2012)