<![CDATA[Biblioteca UGB Search for 'au:"[s.n.]" and au:[s.n.] and itype:BK and su-to:SISTEMA MARXISTA']]> https://biblioteca.ugb.edu.sv/cgi-bin/koha/opac-search.pl?q=ccl=au%3A%22%5Bs.n.%5D%22%20and%20au%3A%5Bs.n.%5D%20and%20itype%3ABK%20and%20su-to%3ASISTEMA%20MARXISTA&format=rss2 Search results for 'au:"[s.n.]" and au:[s.n.] and itype:BK and su-to:SISTEMA MARXISTA' at Biblioteca UGB 7 0 20