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R. ARDO APRIZAL, NPM 2002400084 (2024) THE EFFECTIVENESS OF THE DUTIES AND FUNCTIONS OF THE AIR AND WATER POLICE (POLAIRUD) IN THE ROKAN HILIR POLICE STATION. Tugas_Akhir (Artikel) Enrichment : Journal of Multidisciplinary Research and Development, 2 (2). ISSN 2987-3398 (e-ISSN)