https://biblioteca.ugb.edu.sv/cgi-bin/koha/opac-search.pl?idx=an%2Cphr&q=441%26limit%3Dau%3A%5Bs.n.%5D%26limit%3Dsu-to%3AECONOMIA%26limit%3Dlocation%3AHEM&format=rss2 Search results for 'an,phr: 441&limit=au:[s.n.]&limit=su-to:ECONOMIA&limit=location:HEM' at Biblioteca UGB 0 20