Khan S, Ashraf M, Khan SK. Assessment of drought occurrences in Zhob District using Standardized Precipitation Index from 1981-2018. Journal of Geography and Social Sciences (JGSS) [Internet]. 2020 Dec. 31 [cited 2024 Nov. 25];2(2):110-21. Available from: http://jgssjournal.uob.edu.pk/journal/index.php/jgss/article/view/13