Muhammad Athar Naufal and Salmahaminati, S. (2024) “Analisis Kadar COD (Chemical Oxygen Demand) Dan TSS (Total Suspended Solid) Pada Air Sungai Di Daerah Semarang”, INDONESIAN JOURNAL OF CHEMICAL RESEARCH, 9(1). doi: 10.20885/ijcr.vol9.iss1.art4.