HARYONO, H.; RUBAYA, A. K. Filter ZeRAK for Decreasing Water Hardness and Coliform. Sanitasi: Jurnal Kesehatan Lingkungan, [S. l.], v. 12, n. 2, p. 63–69, 2020. DOI: 10.29238/sanitasi.v12i2.1025. Disponível em: https://e-journal.poltekkesjogja.ac.id/index.php/Sanitasi/article/view/1025. Acesso em: 6 nov. 2024.