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United Nations Environment Programme ,  [Gems-Water: Report of a Workshop on Water Quality Monitoring and Assessment - Report Series No. 12] ,  Gems-Water: Report of a Workshop on Water Quality Monitoring and Assessment - Report Series No. 12

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

United Nations Environment Programme ,  International Institute of Tropical Agriculture ,  International Board for Plant Genetic Resources ,  Consiglio Nazionale delle Ricerche ,  [Crop Genetic Resources of Africa Volume II: Proceedings of an International Conference on Crop Genetic Resources of Africa] ,  Crop Genetic Resources of Africa Volume II: Proceedings of an International Conference on Crop Genetic Resources of Africa