Arif, Said, salak boazza, Yahia El-Khalki, and Ahmed Amine Bourkiba. 2019. “The Use of GIS in the Study of Forms and Methods of Water erosion in the Great Atlas of the Middle”. Journal of Natural Sciences, Life and Applied Sciences 3 (3): 120-94. https://doi.org/10.26389/AJSRP.S280219.