https://biblioteca.ugb.edu.sv/cgi-bin/koha/opac-search.pl?idx=an%2Cphr&q=757%26limit%3Dsu-to%3AAPRENDIZAJE%26limit%3Dau%3APacheco%20Ch%C3%83%C2%83%C3%82%C2%A1vez%2C%20H%C3%83%C2%83%C3%82%C2%A9ctor%20Mauricio%26limit%3Davailable&format=rss2 Search results for 'an,phr: 757&limit=su-to:APRENDIZAJE&limit=au:Pacheco Chávez, Héctor Mauricio&limit=available' at Biblioteca UGB 0 20