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United Nations Environment Programme ,  Food and Agriculture Organization of the United Nations ,  Government of Senegal ,  [Inventory and Monitoring of Sahelian Pastoral Ecosystems Annex 4: Sampling the Sahel - GEMS Sahel Series No. 4] ,  Inventory and Monitoring of Sahelian Pastoral Ecosystems Annex 4: Sampling the Sahel - GEMS Sahel Series No. 4

United Nations Environment Programme ,  Food and Agriculture Organization of the United Nations ,  Government of Senegal ,  [Inventory and Monitoring of Sahelian Ecosystems Annex 3: Use of Light Aircraft in the Inventory and Monitoring of Sahelian Pastoral Ecosystems - GEMS Sahel Series No. 3] ,  Inventory and Monitoring of Sahelian Ecosystems Annex 3: Use of Light Aircraft in the Inventory and Monitoring of Sahelian Pastoral Ecosystems - GEMS Sahel Series No. 3

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