https://biblioteca.ugb.edu.sv/cgi-bin/koha/opac-search.pl?q=ccl=an%3A17219%20and%20su-to%3AEL%20SALVADOR%20and%20su-to%3ADERECHO%20CIVIL%20and%20su-to%3ADERECHOS%20POLITICOS%20and%20su-to%3ADERECHO%20CIVIL%20and%20itype%3ABK%20and%20au%3AONU%20Organizaci%C3%83%C2%B3n%20de%20las%20Naciones%20Unidas%20and%20su-to%3AORGANO%20JUDICIAL&format=rss2 Search results for 'an:17219 and su-to:EL SALVADOR and su-to:DERECHO CIVIL and su-to:DERECHOS POLITICOS and su-to:DERECHO CIVIL and itype:BK and au:ONU Organización de las Naciones Unidas and su-to:ORGANO JUDICIAL' at Biblioteca UGB 0 20