Comperative Performances of Single and Dual Media Filters of Sand and Burnt Oil Palm Shell. Jurnal Teknologi, [S. l.], v. 45, n. 1, p. 43–52, 2012. DOI: 10.11113/jt.v45.340. Disponível em: https://journals.utm.my/jurnalteknologi/article/view/340.. Acesso em: 18 jul. 2024.