Animals and plants threatened with extinction

Early version of Red Data book; incomplete. Some of the papers in Recently Extinct Species section are dated 1962, titled "Red Data Book", and attributed to the IUCN Operation Intelligence Centre. Back sleeve pocket includes two booklets dated 1980 entited "How to use the IUCN Red Data Book Categories" and "Como usar las categorias del Libro Rojo de Datos de la UICN."