http://www.imba-europe.org/events/trail-building-school-val-di-sole
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European MTB Survey – MTBCult
https://www.mtb-mag.com/tbs-trail-building-school-imparare-a-costruire-trail/
24/02/2015 – Bicilive – http://mountainbike.bicilive.it/menu/trail-builder/proteggi-sentieri-supporta-imba-italia/
