Alfredo R. Rabena and Alma B. Segismundo 2004. Limnological Study of Lagoons in Tagudin, Ilocos Sur. The Vector: International Journal of Emerging Science, Technology and Management (IJESTM). 13, 1 (Dec. 2004). DOI:https://doi.org/10.69566/ijestm.v13i1.174.