EROSIÓN

http://acercatealassociales.blogspot.com/2015/09/agentes-externos-del-relieve-erosion.html

https://www.portaleducativo.net/quinto-basico/721/Erosion

http://www.madrimasd.org/blogs/universo/2008/08/15/98822

http://odas.educarchile.cl/objetos_digitales/odas_sociedad/ODA19_como_modifican_relieves/ODA7_19_02.swf

http://www.eschooltoday.com/landforms/erosion-and-landforms.html