Mae C. Perez, A., & Blanco, A. C. (2017). Combination of MODIS Vegetation Indices, GRACE Terrestrial Water Storage Changes, and In-Situ Measurements for Drought Assessment in Cagayan River Basin, Philippines. JNRD - Journal of Natural Resources and Development, 7, 45-55. https://doi.org/10.5027/jnrd.v7i0.06