| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Natural Links:Project Pack in Ecology for 9 to 13 year olds | 978-0-521-24238-7 (0-521-24238-X) | 1985 | Anne Clarke · Stephen Pollock |
| Natural Links: Project Pack in Ecology for 9 to 13 year olds | 978-0-521-28545-2 (0-521-28545-3) | 1985 | Anne Clarke · Stephen Pollock |