http://biblioteca1.aunar.edu.co/cgi-bin/koha/opac-search.pl?q=ccl=su-na%3Dau%3A%22Escobar%20Valenzuela%2C%20Gustavo&format=rss2 Search results for 'su-na=au:"Escobar Valenzuela, Gustavo' at Biblioteca Zambrano Bucheli AUNAR 0 20