https://www.365mountainbike.com/news-mtb/1919-3-trail-building-school-imba-italia-in-val-di-sole.html
Potrebbe anche interessarti
http://www.pinkbike.com/news/val-di-sole-to-host-imba-italia-trail-building-school-2017.html
http://www.mtb-mag.com/un-successo-il-primo-corso-imba-di-trailbuilding/
http://www.solobike.it/mountain-bike/news/Sondaggio-IMBA-Europa-sulle-abitudini-dei-MTBiker