KHAN, S.; ASHRAF, M.; KHAN, S. K. Assessment of drought occurrences in Zhob District using Standardized Precipitation Index from 1981-2018. Journal of Geography and Social Sciences, [S. l.], v. 2, n. 2, p. 110–121, 2020. DOI: 10.12345/jgss.v2i2.13. Disponível em: http://jgss.uob.edu.pk/journal/index.php/jgss/article/view/13. Acesso em: 13 oct. 2025.