| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Missionaries | 978-0-563-20702-3 (0-563-20702-7) | 1990 | Richard Bradley |
| Naturewatch | 978-0-00-219956-8 (0-00-219956-4) | 1994 | Robin Brown |
| The Nature Watchers: Exploring Wild Life with the Experts | 978-0-00-219149-4 (0-00-219149-0) | 1985 | " |