Ratni Juliardi AR, Naniek, and Muhammad Rasich Nabil Adis. 2021. “ANALISIS DISTRIBUSI PENCEMARAN BIOLOGICAL OXYGEN DEMAND (BOD) DAN DISSOLVED OXYGEN (DO) DENGAN METODE GEOGRAPHIC INFORMATION SYSTEM (GIS) DAN STREETER PHELPS DI SEPANJANG KALI SURABAYA”. Envirotek : Jurnal Ilmiah Teknik Lingkungan 13 (2):10-15. https://doi.org/10.33005/envirotek.v13i2.108.