Alatorre, L.C. and Beguería, S. 2013. Idenitifying active erosion areas and areas at risk by remote sensing : an example in a badlands landscape on marls in teh Central Spanish Pyrenees. Cuadernos de Investigación Geográfica. 35, 2 (Jun. 2013), 171–194. DOI:https://doi.org/10.18172/cig.1217.