Santoalla, R., Cortes, J., Generos, K., Monta, V., Tan, F., Uy, F. and Leng, L.S. 2018. Hydrologic Modeling and Delineation of Calumpang River Watershed using GIS and Hydrologic Model System. Journal of Telecommunication, Electronic and Computer Engineering (JTEC). 10, 1-14 (May 2018), 59–62.