| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Flora of Northamptonshire and the Soke of Peter | 978-0-907381-03-7 (0-907381-03-0) | 1995 | Rob Wilson |
| The Flora of Northamptonshire and the Soke of Peterborough | 978-0-907381-08-2 (0-907381-08-1) | 1995 | " |