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Except where otherwise noted, this item's license is described as This series is licensed under the Creative Commons Attribution-Non-Commercial-NoDerivs 3.0 Unported License (http://creativecommons.org/licenses/by-ncnd/3.0/). Attribution: You must attribute the work in the manner specified by the author or licensor. Non-commercial: You may not use this work for commercial purposes No Derivative Works: You may not alter, transfer, or build on this work. Users are welcome to copy, distribute, display, translate or perform this work without written permission. For any reuse or distribution, you must make clear to others the licence terms of this work. If you use the work, we ask that you reference the SLH website and send a copy of the work or a link to its use online to the following address: Sanitation Learning Hub, Institute of Development Studies, University of Sussex, Brighton, BN1 9RE, UK (SLH@ids.ac.uk)