RONNY, Ronny; ARIF, Muhammad Ikbal; NOTOBROTO, Hari Basuki. Water Pollution Index: Measurement of Shallow Well Water Quality in Urban Areas. International Journal of Environment, Engineering and Education, [S. l.], v. 1, n. 3, p. 75–81, 2019. DOI: 10.55151/ijeedu.v1i3.19. Disponível em: https://ijeedu.com/index.php/ijeedu/article/view/19. Acesso em: 1 may. 2026.