Directrices para el Uso de los Criterios de la Lista Roja de la UICN a Nivel Regional y Nacional (Versión 4.0)

Originally prepared by the IUCN Species Survival Commission in June 2003 and revised by the National Red List Working Group of the IUCN SSC Red List Committee in June 2010. Click here to access the document via the IUCN Red List website.