Wadi Halfa (Sudan) social and economic survey: report on the income and expenditure survey (including results of a livestock survey) (Aug 1960 - May 1961)

alimentos budget familial consommation consumer expenditure consumo consumption encuestas family budget foods ganado gastos de consumo hogares households income livestock methode methods presupuesto familiar produit alimentaire renta revenu rural areas surveys urban areas zonas rurales zonas urbanas zone rurale zone urbaine