| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Augrabies Splendour: A Guide to National History of the Augrabies Falls National Park and the Riemvasmaak Wildlife Area | 978-0-620-26215-6 | 2000 | |
| Augrabies Weelde: 'n Natuurhistoriese Gids Tot Die Augrabies-Waterval Nastional Park En Die Riemvasmaak Natuurgebied | 978-0-620-26214-9 | 2000 | |
| Die Kalahari En Sy Plante | 978-0-620-23415-3 | 1999 | le Riche Elias |
| The Kalahari and its Plants | 978-0-620-23416-0 | 1999 | Elias le Riche |