http://www.asdemissionizero.com/2017/02/trail-building-school-val-sole.html
Potrebbe anche interessarti
Aperte le iscrizioni al 5° Trail Building School
http://www.mtbcult.it/storie/imba-italia-tutti-a-scuola-di-trail-building/
http://news.cycling.it/news_d.asp?out_param=cyclingit/news/13/3/2015/Primo%20corso%20di%20trail%20building%20ad%20aprile&id=11849
https://agendadegliappunti.wordpress.com/2018/02/16/trail-building-school-imba-garda-trentino/