Study the Use Value of Ecosystem Mangrove in Tanjung Batu Village Derawan Island Subdistric, Berau Regency . jppa [Internet]. 2018 Jul. 1 [cited 2025 Oct. 25];5(2):49-57. Available from: https://jppa.fpik.unmul.ac.id/index.php/ojs/article/view/137