PURIFICATION EXPERIMENTS ON THE PASIG RIVER, PHILIPPINES USING A CIRCULATION-TYPE PURIFICATION SYSTEM. GEOMATE Journal, [S. l.], v. 16, n. 54, p. 49–54, 2021. Disponível em: https://geomatejournal.com/geomate/article/view/2624. Acesso em: 15 may. 2026.