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United Nations Environment Programme ,  African Ministerial Conference on the Environment ,  [Rapport de la réunion du groupe d’experts: Conférence ministérielle africaine sur l’environnement - Dix-septième session] ,  [Report of the Expert Group Segment: African Ministerial Conference on the Environment - Seventeenth Session] ,  Report of the Expert Group Segment: African Ministerial Conference on the Environment - Seventeenth Session

United Nations Environment Programme ,  International Institute for Tropical Agriculture ,  [Nitrogen Cycling in West African Ecosystems: Proceedings of a Workshop Arranged by the SCOPE/UNEP International Nitrogen Unit in Collaboration with MAB (Unesco) and IITA] ,  Nitrogen Cycling in West African Ecosystems: Proceedings of a Workshop Arranged by the SCOPE/UNEP International Nitrogen Unit in Collaboration with MAB (Unesco) and IITA