Ouatiki, Kawtar, Lahcen Bahi, Mohamed Ould Awa, Latifa Ouadif, Ahmed Akhssas, and El Houcine Ejjaaouani. 2016. “Identification Of Collapsible Soils In Deroua (Morocco)”. European Scientific Journal, ESJ 12 (6), 255. https://doi.org/10.19044/esj.2016.v12n6p255.