Galvez A. District Supervisors’ Instructional Supervisory Practices Vis-A-Vis School Heads’ Work Performance: Bases For Professional Development Interventions. IJERIP [Internet]. 2026 Jun. 16 [cited 2026 Jun. 18];2(6):1143-75. Available from: https://ijerip.erio.org.ph/index.php/articles/article/view/1018