https://biblioteca.cita-aragon.es/cgi-bin/koha/opac-search.pl?q=ccl=au%3AGuerra%20Espinel%2C%20Guillermo%20and%20au%3AGuerra%20Espinel%2C%20Guillermo%20and%20se%3ADirecci%C3%AF%C2%BF%C2%BD%C3%AF%C2%BF%C2%BDn%20de%20Empresas%20Agropecuarias%2C%20Biblioteca%20b%C3%AF%C2%BF%C2%BD%C3%AF%C2%BF%C2%BDsica&format=rss2 Search results for 'au:Guerra Espinel, Guillermo and au:Guerra Espinel, Guillermo and se:Direcci��n de Empresas Agropecuarias, Biblioteca b��sica' at 0 20