GHONIYYAH, QONITAH, and SRI MASTUTI PURWANINGSIH. “PENCEMARAN KALI SURABAYA TAHUN 1982-1994”. AVATARA e-Journal Pendidikan Sejarah 8, no. 5 (January 29, 2020). Accessed August 22, 2026. https://ejournal.unesa.ac.id/index.php/avatara/article/view/32022.