1. Salt-Affected Soils and Their Management;Abrol,1988
2. Köppen Climate Classification
https://www.britannica.com/science/Koppen-climate-classification
3. Monographie de la Région Laayoune-Sakia El Hamra, 2020
https://www.hcp.ma/region-laayoune/attachment/2258177/
4. Monographie de la région Dakhla Oued Dahab, 2018
https://www.hcp.ma/region-eddakhla/attachment/1410090/
5. ISO 11265:1996 Soil Quality—Determination of the Specific Electrical Conductivity,1996