430 _ 0
‡a
ECA studies in development research papers series
410 2 _
‡a
Nations Unies.
‡b
Commission économique pour l'Afrique.
‡b
Socio-economic Research and Planning Division.
‡t
Development research paper series
430 _ 0
‡a
UNECA development research papers series
410 2 0
‡a
United Nations.
‡b
Economic Commission for Africa.
‡b
Socio-economic Research and Planning Division.
‡t
Development research paper series