Enlace original:
https://wedocs.unep.org//handle/20.500.11822/29128
United Nations Environment Programme
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[Desertification Control Bulletin Number 32, 1998: A Bulletin of World Events in the Control of Desertification Restoration of Degraded Lands and Reforestation]
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Desertification Control Bulletin Number 32, 1998: A Bulletin of World Events in the Control of Desertification Restoration of Degraded Lands and Reforestation