Duba, Gelgelo Wako, et al. “Meteorological Droughts from 1987-2017 in Yabello and El-Woye Areas of Borana, Oromia Region, Ethiopia”. Ethiopian Journal of Social Sciences (EJSS), vol. 7, no. 1, July 2021, https://journals.bdu.edu.et/index.php/ejss/article/view/634.