Asrori, M. Khadik. “PEMETAAN KUALITAS AIR SUNGAI DI SURABAYA”. Envirotek : Jurnal Ilmiah Teknik Lingkungan 13, no. 2 (October 29, 2021): 41–47. Accessed November 21, 2024. https://envirotek.upnjatim.ac.id/index.php/envirotek/article/view/127.