ahmad ramadhani and V. Purnama, “Analisis Kadar BOD (Biological Oxygen Demand) dan COD (Chemical Oxygen Demand) Pada Air Sungai Batang Masumai Kabupaten Merangin Di UPTD Laboratorium Dinas Lingkungan Hidup”, IJCR, vol. 7, no. 2, pp. 36–43, Feb. 2023.