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	Design, Construction supervision, Operation and Maintenance (DCOM) manual: Volume 4 Operation and Maintenance of Water supply and Sanitation projects  manuel - 2020 - 304 pp Ed. Ministry of Water - Dar es salaam
	Guidelines for the Application of Small-Scale, Decentralised Wastewater Treatment Systems  guide - 2018 - 88 pp Ed. Ministry of Water - Dar es salaam

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