http://canadianbiodiversity.mcgill.ca/francais/conservation/activities.html
http://fr.wikipedia.org/wiki/Prairies_%C3%A0_herbes_courtes_du_Nord
http://ecozones.ca/francais/zone/Prairies/land.html
http://www.peoplepowerprocess.com/habitats-differents-dans-un-ecosysteme-de-prairie.html
http://fr.wikipedia.org/wiki/For%C3%AAt-parc_de_trembles
http://esask.uregina.ca/entry/soils.html
http://canadianbiodiversity.mcgill.ca/english/ecozones/prairies/prairies.htm#ima
http://www.destinationcanada.info/canadas_top_ten_attractions.html