Daoed, D. et al. 2018. Evaluation of Drought Vulnerability on Watersheds in West Sumatera Province by Using Cropwat-8 and GIS. International Journal on Advanced Science, Engineering and Information Technology. 8, 6 (Dec. 2018), 2443–2449. DOI:https://doi.org/10.18517/ijaseit.8.6.3520.