Potrebbe anche interessarti
http://www.asdemissionizero.com/2016/02/trail-building-school-torino.html
https://www.imba-europe.org/events/trail-building-school-riva-del-garda
http://mountainbikeworld.it/attualita/2016/02/09/corsi-di-formazione-trail-building-imba-a-meta-aprile/
https://www.365mountainbike.com/news-mtb/1919-3-trail-building-school-imba-italia-in-val-di-sole.html