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3. WHO Kobe Center: A Billion Voices: Listening and Responding to the Health Needs of Slum Dwellers and Informal Settlers in the New Settings (2005)
4. UN-Habitat: A Practical Guide to Designing, Planning, and Executing Citywide Slum Upg rading Programmes (2014)
5. Khalifa, M.A.: Redefining slums in Egypt: unplanned versus unsafe areas. Habitat Int. 35(1), 40–49 (2011)