http://bibliotecas.uasb.edu.bo/cgi-bin/koha/opac-search.pl?q=ccl=au%3A%22P%C3%83%C2%A9rez%2C%20Roberto%20%22&format=rss2 Search results for 'au:"Pérez, Roberto "' at Bibliotecas UASB - Sede Bolivia - 0 20