DD A, EO O, OS O. West Africa’s Drought Dynamics: An Investigation of SPI and SPEI indices (1979-2021). Int J Phys Res Appl [Internet]. 2024 Jul. 24 [cited 2025 Apr. 25];7(2):108-1. Available from: https://www.physicsresjournal.com/ijpra/article/view/ijpra-aid1093