http://www1.universia.net/catalogaxxi/C10048PPESII1/S139660/P139652NN1/INDEX.HTML1980 SAN GUILLERMO EN RESERVAS DE LA BIOSFERA - UNESCOhttp://www1.universia.net/catalogaxxi/img/cabecera/universia1.gif http://www1.universia.net/CatalogaXXI «The San Guillermo Biosphere Reserve in the northwest of San Juan province represents the mixed mountain and highland systems in the foothills and mountains of the Andes occupying the west sector of Catamarca, La Rioja, San Juan and Mendoza Provinces. The Biosphere Reserve constitutes two phytogeographical regions: the Chaco and the Andean region.» ]]>