www.internationalwildernessguide.com
www.interpretiveguides.org
www.mbooutdoor.com
www.wildernessguidesassociation.com
http://www.mfaeurope.nl/
www.mahikan.ca
Nederlandse Klim en Bergsport Vereniging
Espace eau vive ‘Isle de la Serre’
http://www.internationalrafting.com/
