Sulistiyowati, Eka, and Shofwatul Uyun. 2024. “Participatory Water Quality Monitoring System for the Gajahwong River, Yogyakarta City, Indonesia ”. Engagement: Jurnal Pengabdian Kepada Masyarakat 8 (1), 101-16. https://doi.org/10.29062/engagement.v8i1.1525.