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