| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| 50+ Foot Challenges: Assessment and Evidence-Based Management | 978-0-443-10402-2 (0-443-10402-6) | 2009 | Colin Thomson PhD FCPod(S) |
| 50 Foot Challenges: Assessment and Management | 978-0-443-06495-1 (0-443-06495-4) | 2002 | " |