MAULANA, Rahman Muda; MULYA, Miswar Budi; ATHTHORICK, T. Alief. The Condition of Coral Reefs Ecosystem in Poncan Gadang Island Sibolga City and Management Efforts. Journal of Environmental and Development Studies, [S. l.], v. 6, n. 01, p. 026–033, 2025. DOI: 10.32734/jeds.v6i01.16759. Disponível em: https://talenta.usu.ac.id/jeds/article/view/16759. Acesso em: 21 may. 2026.