Dhaif Allah, Ali Ahmed, and Noorazuan Md. Hashim. “Analysis of Meteorological Drought in Tihama Plain, Yemen Using Standardized Precipitation Index (SPI)”. GEOGRAFI 4, no. 2 (October 5, 2016): 9–20. Accessed February 24, 2024. https://ojs.upsi.edu.my/index.php/GEOG/article/view/1930.