Rizal AM, Asyfiradayati R. Differences in the reduction of coliform bacteria and escherichia coli with the chlorine diffuser method combined with silica sand in clean water. midwifery [Internet]. 2024 Aug. 31 [cited 2026 Oct. 25];12(3):1193-9. Available from: https://midwifery.iocspublisher.org/index.php/midwifery/article/view/1632