| Verfasser | Häufigkeit |
| Gahm, Hermann |
3 |
| Swanepoel, Christiaan |
3 |
| Swanepoel, H. L. |
3 |
| Westenberger, Eric |
3 |
| Schneider, Thorsten |
2 |
| Wet, Johannes C. de |
2 |
| Schneider, Thorsten 1974- |
1 |
| Swanepoel, Hendrik Lambertus 1912-1972 |
1 |
| Swanepoel, Hennie |
1 |
| Swanepoel, J. H. |
1 |