Eltayeb, Manahil, and Sulafa Hag-elsafi. “Assessment of Regression Model for Rainfall in Saudi Arabia (1979-2011) Using Dummy Variables”. Dirasat: Human and Social Sciences 50, no. 3 (May 30, 2023): 167–176. Accessed May 1, 2026. https://dsr.ju.edu.jo/djournals/index.php/Hum/article/view/5404.