Bolay, Jean-ClaudeChenal, Jérôme2011-04-102011-04-102011-04-102008https://infoscience.epfl.ch/handle/20.500.14299/66075slum upgradingurban developmentMauritaniaNouakchottHousingGRETTwizeÉvaluation externe du programme Twize en Mauritane Mandat du GRET - Paristext::report