Alma Bolante Segismundo, and Remedios Ralleta Navarro. “Socio-Economic Profile of the Sea Urchin Fishermen in Nalvo, Sta. Maria, Ilocos Sur”. The Vector: International Journal of Emerging Science, Technology and Management (IJESTM), vol. 15, no. 1, Dec. 2006, doi:10.69566/ijestm.v15i1.190.