Washington, DC : World Bank, Middle East and North Africa Region, Poverty Reduction and Economic Management Unit, 2009 ; Halle (Saale) : Universitäts- und Landesbibliothek Sachsen-Anhalt, 2009
Washington, DC : World Bank, Middle East and North Africa Region, Social and Economic Development Dep., 2010 ; Halle (Saale) : Universitäts- und Landesbibliothek Sachsen-Anhalt, 2010