Basson, P.A.; Miller, E.S.; Kellerman, T. Stephanus; Albl, P.; Von Maltitz, L.J.F.; Welman, Wilhelmina G.(Published by The Government Printer, Pretoria, 1975)
Basson, P.A.; Morgenthal, J.C.; Bilbrough, R.B.; Marais, Johannes Lodewyk; Kruger, S.P.; Van der Merwe, J.L.(Published by the Government Printer, Pretoria, 1969)