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United Nations Environment Programme ,  [Desertification Control Bulletin Number 18, 1990] ,  Desertification Control Bulletin Number 18, 1990

United Nations Environment Programme ,  [Desertification Control Number 7, December 1982] ,  Desertification Control Number 7, December 1982

United Nations Environment Programme ,  [Desertification Control Bulletin Number 11, December 1984 - A Bulletin of World Events in the Control of Deserts, Restoration of Degraded Lands and Reforestation] ,  Desertification Control Bulletin Number 11, December 1984 - A Bulletin of World Events in the Control of Deserts, Restoration of Degraded Lands and Reforestation

United Nations Environment Programme ,  [Desertification Control Bulletin Number 17, 1988: A Bulletin of World Events in the Control of Desertification Restoration of Degraded Lands and Reforestation] ,  Desertification Control Bulletin Number 17, 1988: A Bulletin of World Events in the Control of Desertification Restoration of Degraded Lands and Reforestation

United Nations Environment Programme ,  [Desertification Control Bulletin Number 29, 1996: A Bulletin of World Events in the Control of Desertification Restoration of Degraded Lands and Reforestation] ,  Desertification Control Bulletin Number 29, 1996: A Bulletin of World Events in the Control of Desertification Restoration of Degraded Lands and Reforestation

United Nations Environment Programme ,  [Desertification Control Number 10, May 1984: A Bulletin of World Events in the Control of Desertification Restoration of Degraded Lands and Reforestation] ,  Desertification Control Number 10, May 1984: A Bulletin of World Events in the Control of Desertification Restoration of Degraded Lands and Reforestation

United Nations Environment Programme ,  [Can Desert Encroachment Be Stopped? A Study with Emphasis on Africa - Ecological Bulletins No. 24] ,  Can Desert Encroachment Be Stopped? A Study with Emphasis on Africa - Ecological Bulletins No. 24

United Nations Environment Programme ,  [Combating Global Climate Change by Combating Land Degradation: Proceedings of a Workshop held in Nairobi, Kenya] ,  Combating Global Climate Change by Combating Land Degradation: Proceedings of a Workshop held in Nairobi, Kenya

United Nations Environment Programme ,  [Combating Desertification Through Integrated Development - International Scientific Symposium] ,  Combating Desertification Through Integrated Development - International Scientific Symposium

United Nations Environment Programme ,  Food and Agriculture Organization of the United Nations ,  [The Ecological Management of Arid and Semi-Arid Rangelands in Africa and the Near and Middle East (EMASAR): Formulation of an International Cooperative Programme - Report of an International Conference held in Rome] ,  The Ecological Management of Arid and Semi-Arid Rangelands in Africa and the Near and Middle East (EMASAR): Formulation of an International Cooperative Programme - Report of an International Conference held in Rome