“Monthly to Inter-decadal Rainfall Variability of the Southern Regional State of Ethiopia, Links with El Nino-Southern Oscillation”, GJSFR, vol. 19, no. H2, pp. 13–31, Jul. 2019, Accessed: Aug. 13, 2026. [Online]. Available: https://www.journalofscience.org/index.php/GJSFR/article/view/2488