Relentless Forward Progress: A Guide to Running Ultramarathons
| Country | USA |
| Author | Jason Robillard |
| Binding | Kindle Edition |
| Format | Kindle eBook |
| IsAdultProduct | |
| Label | Barefoot Running University Press, LLC |
| Manufacturer | Barefoot Running University Press, LLC |
| NumberOfPages | 169 |
| PublicationDate | 2013-03-25 |
| Publisher | Barefoot Running University Press, LLC |
| ReleaseDate | 2013-03-25 |
| Studio | Barefoot Running University Press, LLC |