Kalbermatten, J.M., Julius, D.S. and Gunnerson, C.G., 1980. Appropriate technology for water supply and sanitation : a summary of technical and economic options. (Appropriate technology for water supply and sanitation / World Bank; no. 1-A). [online] Washington, DC, USA: World Bank.

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Subjects: excreta disposal systems | excreta collection | sewerage | comparative analysis | selection criteria | appropriate technology | costs | health aspects | field studies | institutional framework;