UNESCO2015-07-152015-07-15https://bibliotecadigital.ciren.cl/handle/20.500.13082/25091PDFesAtribución 3.0 ChileEcologíaConservación de recursosZona DesérticaBiósferaSahelProgramme in man and the biosphere (mab). Regional meeting on integrated ecological research and training needs in the sahelian regionLibroSector agrícola3442