| Authors Name |
|---|
| Anoniem [1] |
| Boner, K [1] |
| De Klerk, C J [1] |
| De Klerk, P [1] |
| Dreyer, N [1] |
| Gunning, N R [1] |
| Horn, J M L [2] |
| Human, J H [4] |
| Kapp, P H [1] |
| Kriel, Christo [1] |
| Longland, H D [1] |
| Mulholland, R B [1] |
| Olivier, Johan [1] |
| Trümpelmann, M H [4] |
| Van Aswegen, H.J. [1] |
| Vorster, Tony [1] |