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This very comprehensive technical paper includes important background information, a detailed description of the principle of slow sand filtration and much information on the construction, design and implementation of slow sand filtration plants.
DIJK, J.C. van OOMEN, J.H.C. (1978): Slow Sand Filtration for Community Water Supply in Developing Countries. A Design and Construction Manual. (= IRC Technical Paper Series , 11 ). The Hague: International Reference Centre for Community Water Supply URL [Accessed: 30.05.2018]