To Design Composite Clay Filter Using Clay Sand and Charcoal for Rural Areas. International Journal of Emerging Engineering and Technology, [S. l.], v. 5, n. 1-1, p. 11–18, 2026. DOI: 10.57041/t6y9pe94. Disponível em: https://grsh.org/journal1/index.php/ijeet/article/view/185.. Acesso em: 31 aug. 2026.