| title | ISBN-13 | year of publication |
|---|---|---|
| Caves | 978-0-07-094322-3 | 1969 |
| Life at the Poles | 978-0-07-094320-9 | 1969 |
| Man's ancestors | 978-0-07-094319-3 | 1968 |
| Useful animals | 978-0-07-094317-9 | 1969 |
| Useful plants | 978-0-07-094318-6 | 1969 |
C.D. · C L · C.L. Duddington · Charles D · Charles L. · L.D. · Lionel D.