School Head Leadership: Basis of Elementary Schools’ Performance in Castilla Districts, Division of Sorsogon. JPAIR Institutional Research, [S. l.], v. 24, n. 1, p. 1–56, 2025. DOI: 10.7719/irj.v24i1.947. Disponível em: https://philair.org/index.php/irj/article/view/947. Acesso em: 16 sep. 2025.