Daoed, D., Rusman, B., Istijono, B., Hakam, A., & Syukur, M. (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), 2443–2449. https://doi.org/10.18517/ijaseit.8.6.3520