Sihombing K, Harahap RH, Mulya MB. ANALYSIS OF COASTAL WATER QUALITY AT MARINE TOURISM SITES IN THE CITY OF SIBOLGA. ajoas [Internet]. 2023Dec.25 [cited 2025Aug.25];6(3):447-55. Available from: https://jptl.ejournal.unri.ac.id/index.php/ajoas/article/view/259