| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 2009 | 978-0-9560144-0-5 | J. Poland ยท E.J. Clement | The Vegetative Key to the British Flora |
| 2018 | 978-0-9560144-1-2 | John Poland | The Field Key to Winter Twigs: A Guide to Native and Planted Deciduous Trees, Shrubs and Woody Climbers (Xylophytes) Found in the British Isles |