Nadia Hatem Tuama. Geographical analysis of drought and its impact on vegetation and water cover in Ali Al-Gharbi district using the SPI index and the two peers NDVI and NDWI . misan jas [Internet]. 2021Jun.30 [cited 2024Nov.21];20(40):255-77. Available from: https://misan-jas.com/index.php/ojs/article/view/200